function formCheck(mode, description)
{ 
	if (!checkUnselects(document.forms[0].RECEIVE_YES_NO))
    		{
    			alert("Please specify whether you wish to receive Military & Aerospace Electronics.");
            		document.forms[0].RECEIVE_YES_NO[0].focus();
    			return false;
    		}

	if(document.forms[0].RECEIVE_YES_NO[1].checked == true)
	// stop validation when "not to receive" response
	{
		return true;
	}
	if (!checkUnselects(document.forms[0].REQUESTED_VERSION))
    		{
    			alert("Please specify the preferred format.");
    			document.forms[0].REQUESTED_VERSION[0].focus();
    			return false;
    		}

	if ((mode == "SHORT") || (mode == "ABBR"))
	{
		if (document.forms[0].EMAIL_ADDRESS.value == "")
		{
			alert("Please specify your E-mail Address.");
        		document.forms[0].EMAIL_ADDRESS.focus();
			return false;
		}
		if(!validEmail(document.forms[0].EMAIL_ADDRESS.value))
		{
			alert("You have entered an invalid email address. Please re-enter it.");
			document.forms[0].EMAIL_ADDRESS.focus();
			return false;
		}
 	    	if (document.forms[0].EMAIL_ADDRESS2.value == "")
	    	{
		  	alert("Please confirm your email address.");
		  	document.forms[0].EMAIL_ADDRESS2.focus();
		  	return false;
	    	}
		if(document.forms[0].EMAIL_ADDRESS.value.toUpperCase() != document.forms[0].EMAIL_ADDRESS2.value.toUpperCase())
		{
			alert("Confirmation email address does not match email address.");
	        	document.forms[0].EMAIL_ADDRESS.focus();
			return false;
        	}        
        	if (document.forms[0].PHONE.value == "")
		{
			alert("Please specify your Business Phone.");
	    		document.forms[0].PHONE.focus();
			return false;
		}		 

	
		if ((document.forms[0].REQUESTED_VERSION[0].checked == true) &&  (document.forms[0].GEOSTATE.value >= 53))
		{
			alert("Free print subscription is only available for USA addresses.");
        		document.forms[0].REQUESTED_VERSION[0].focus();
			return false;
		}
		return true;
	}

	if (mode == "ADD")
	{
		if(document.forms[0].FNAME.value == "")
		{
			alert("Please specify your First name.");
        		document.forms[0].FNAME.focus();
			return false;
		}
		if(document.forms[0].LNAME.value == "")
		{
			alert("Please specify your Last name.");
        		document.forms[0].LNAME.focus();
			return false;
		}
	}
	if (mode != "RENEW")
	{
		if(document.forms[0].TITLE.value == "")
		{
			alert("Please specify your Title.");
	        	document.forms[0].TITLE.focus();
			return false;
		}
		if(document.forms[0].COMPANY.value == "")
		{
			alert("Please specify your Company name.");
        		document.forms[0].COMPANY.focus();
			return false;
		}
		if(document.forms[0].ADDRESS2.value == "")
		{
			alert("Please specify your Street Address.");
	        	document.forms[0].ADDRESS2.focus();
			return false;
		}
		if(document.forms[0].CITY.value == "")
		{
			alert("Please specify your City.");
	        	document.forms[0].CITY.focus();
			return false;
		}
		if (document.forms[0].STATE.selectedIndex == 0)
		{
			alert("Please specify your State/Province or select 'I am not in the US or Canada'.");
		        document.forms[0].STATE.focus();
			return false;
		}

		// validate Canadian state/postal code combination
		if (!ValidCanPostal(document.forms[0].STATE[document.forms[0].STATE.selectedIndex].value,document.forms[0].ZIPCODE.value))
		{
			alert ("Invalid Canadian province/postal code combination.");
        		document.forms[0].STATE.focus();
			return false;
		}

		if (document.forms[0].STATE[document.forms[0].STATE.selectedIndex].value == "53")
		{
			if (document.forms[0].COUNTRY.value == "")
			{
				alert("Please specify your Country.");
	        		document.forms[0].COUNTRY.focus();
				return false;
			}
		}
		else
		{
			if (document.forms[0].ZIPCODE.value.length < 5)
			{
				alert("Please specify your Zip/Postal Code.");
	        		document.forms[0].ZIPCODE.focus();
				return false;
			}
		}
	}

	if (document.forms[0].EMAIL_ADDRESS.value == "")
	{
		alert("Please specify your E-mail Address.");
        	document.forms[0].EMAIL_ADDRESS.focus();
		return false;
	}
	if(!validEmail(document.forms[0].EMAIL_ADDRESS.value))
	{
		alert("You have entered an invalid email address. Please re-enter it.");
		document.forms[0].EMAIL_ADDRESS.focus();
		return false;
	}
 	    if (document.forms[0].EMAIL_ADDRESS2.value == "")
	    {
		  alert("Please confirm your email address.");
		  document.forms[0].EMAIL_ADDRESS2.focus();
		  return false;
	    }
		if(document.forms[0].EMAIL_ADDRESS.value.toUpperCase() != document.forms[0].EMAIL_ADDRESS2.value.toUpperCase())
		{
			alert("Confirmation email address does not match email address.");
	        document.forms[0].EMAIL_ADDRESS.focus();
			return false;
        }        
         if (mode != "ADD")
	{
		if (document.forms[0].PHONE.value == "")
		{
			alert("Please specify your Business Phone.");
	    		document.forms[0].PHONE.focus();
			return false;
		}	

	}	     	 

	if (((mode == "ADD")|| (mode == "COA")) && (document.forms[0].REQUESTED_VERSION[0].checked == true) &&  (document.forms[0].STATE[document.forms[0].STATE.selectedIndex].value >= 53))
	{
		alert("Free print subscription is only available for USA addresses.");
        	document.forms[0].REQUESTED_VERSION[0].focus();
		return false;
	}
	if ((mode == "RENEW") && (document.forms[0].REQUESTED_VERSION[0].checked == true) &&  (document.forms[0].GEOSTATE.value >= 53))
	{
		alert("Free print subscription is only available for USA addresses.");
        	document.forms[0].REQUESTED_VERSION[0].focus();
		return false;
	}
 } 

function PaidformCheck(mode)
{ 
	if(!checkUnselects(document.paidform.SUBSCRIPTION))	
	{
		alert("Please select your subscription.");
       	document.paidform.SUBSCRIPTION[0].focus();
		return false;
	}
	if (mode == "ADD")
  	{
		if(document.paidform.FNAME.value == "")
		{
			alert("Please specify your First name.");
	       		document.paidform.FNAME.focus();
			return false;
		}
		if(document.paidform.LNAME.value == "")
		{
			alert("Please specify your Last name.");
       			document.paidform.LNAME.focus();
			return false;
		}
	}

	if (mode != "RENEW") 
  	{
		if (!CheckBusAddress())
		{
			return false;
		}
	
				
	} 
	if ((CheckedRadioValue(document.paidform.SUBSCRIPTION) == '11') && 	(document.paidform.EMAIL_ADDRESS.value == ""))
	{
		alert("Email is required for digital version.");
       		document.paidform.EMAIL_ADDRESS.focus();
		return false;
	}	
	if (document.paidform.EMAIL_ADDRESS.value != "") 
    	{
        	if(!validEmail(document.paidform.EMAIL_ADDRESS.value))
	    	{
		  	alert("You have entered an invalid email address. Please re-enter it.");
		  	document.paidform.EMAIL_ADDRESS.focus();
		  	return false;
	    	}	
	    	if (paidform.EMAIL_ADDRESS2.value == "")
	    	{
	       		alert("Please confirm your email address.");
	       		paidform.EMAIL_ADDRESS2.focus();
	       		return false;
	    	}
        	if(paidform.EMAIL_ADDRESS.value != paidform.EMAIL_ADDRESS2.value)
        	{
	       		alert("Confirmation email address does not match email address.");
	       		paidform.EMAIL_ADDRESS.focus();
	       		return false;
        	}   
	}    

	if (!CheckBillAddress())
	{
		return false;
	}
	if (!CheckPaymentInfo())
	{
		return false;
	}
	
	return true;
}
function CheckBusAddress()
{
	if(document.paidform.ADDRESS2.value == "")
	{
		alert("Please specify your Street Address.");
	        document.paidform.ADDRESS2.focus();
		return false;
	}
	if(document.paidform.CITY.value == "")
	{
		alert("Please specify your City.");
	        document.paidform.CITY.focus();
		return false;
	}
       if (document.paidform.STATE.selectedIndex == 0)
		{
			alert("Please specify your State/Province or select 'I am not in the U.S. or Canada'.");
		        document.paidform.STATE.focus();
			return false;
		}
	// validate Canadian state/postal code combination
		if (!ValidCanPostal(document.paidform.STATE[document.paidform.STATE.selectedIndex].value,document.paidform.ZIPCODE.value))
		{
			alert ("Invalid Canadian province/postal code combination.");
        		document.paidform.STATE.focus();
			return false;
		}
                if (document.paidform.STATE[document.paidform.STATE.selectedIndex].value == "53")
		{
			if (document.paidform.COUNTRY.value == "")
			{
				alert("Please specify your Country.");
	        		document.paidform.COUNTRY.focus();
				return false;
			}
		}
		else
		{
		if (document.paidform.ZIPCODE.value.length < 5)
		{
			alert("Please specify your Zip/Postal Code.");
	        	document.paidform.ZIPCODE.focus();
			return false;
		}
	}
	if ((document.paidform.EMAIL_ADDRESS.value != "") && (!validEmail(document.paidform.EMAIL_ADDRESS.value)))
	      {
		alert("You have entered an invalid email address. Please re-enter it.");
		document.paidform.EMAIL_ADDRESS.focus();
		return false;
	      }
	return true;
}

function CheckBillAddress()
{
	if (!ObjectExists(document.paidform, "SAME_ADDRESS"))
	{
		return true;
	}
	if (!document.paidform.SAME_ADDRESS.checked)
	{
		return true;
	}
	if(document.paidform.PD_BILLING_NAME.value == "")
	{
		alert("Please specify Name on card.");
	        document.paidform.PD_BILLING_NAME.focus();
		return false;
	}
	if(document.paidform.PD_BILLING_ADDRESS2.value == "")
	{
		alert("Please specify Billing Street Address.");
	        document.paidform.PD_BILLING_ADDRESS2.focus();
		return false;
	}
	if(document.paidform.PD_BILLING_CITY.value == "")
	{
		alert("Please specify Billing City.");
	        document.paidform.PD_BILLING_CITY.focus();
		return false;
	}
	if (document.paidform.PD_BILLING_STATE.selectedIndex == 0)
	{
		alert ("Please specify Billing State/Province or select 'Not in the U.S. or Canada'.");
		document.paidform.PD_BILLING_STATE.focus();
		return false;
	}
	// validate Canadian state/postal code combination
	if (!ValidCanPostal(document.paidform.PD_BILLING_STATE[document.paidform.PD_BILLING_STATE.selectedIndex].value,document.paidform.PD_BILLING_ZIPCODE.value))
	{
		alert ("Invalid Canadian province/postal code combination in Billing Address.");
        	document.paidform.PD_BILLING_STATE.focus();
		return false;
	}
	if (document.paidform.PD_BILLING_STATE[document.paidform.PD_BILLING_STATE.selectedIndex].value == "53")
	{
		if (document.paidform.PD_BILLING_COUNTRY.value == "")
		{
			alert("Please specify Billing Country.");
	        	document.paidform.PD_BILLING_COUNTRY.focus();
			return false;
		}
	}
	else
	{
		if (document.paidform.PD_BILLING_ZIPCODE.value.length < 5)
		{
			alert("Please specify Billing Zip/Postal Code.");
	        	document.paidform.PD_BILLING_ZIPCODE.focus();
			return false;
		}
	}
	return true;
}


function CheckPaymentInfo()
{
	if(!checkDropdown(document.paidform.CARD_TYPE))
	{
		alert("Please specify credit card.");
        	document.paidform.CARD_TYPE.focus();
		return false;
	}

	if(document.paidform.CARD_NUMBER.value == "")
	{
		alert("Please specify credit card number.");
        	document.paidform.CARD_NUMBER.focus();
		return false;
	}

	// Visa
	if(document.paidform.CARD_TYPE.selectedIndex == 1)
	{
		if (!isVisa(stripWhitespace(document.paidform.CARD_NUMBER.value)))
		{
			alert("Invalid credit card number. Please re-enter.")
        		document.paidform.CARD_NUMBER.focus();
			return false;
		}
	}

	// MasterCard
	if(document.paidform.CARD_TYPE.selectedIndex == 2)
	{
		if (!isMasterCard(stripWhitespace(document.paidform.CARD_NUMBER.value)))
		{
			alert("Invalid credid card number. Please re-enter.")
        		document.paidform.CARD_NUMBER.focus();
			return false;
		}
	}
	
	// AmEx
	if(document.paidform.CARD_TYPE.selectedIndex == 3)
	{
		if (!isAmericanExpress(stripWhitespace(document.paidform.CARD_NUMBER.value)))
		{
			alert("Invalid credid card number. Please re-enter.")
        		document.paidform.CARD_NUMBER.focus();
			return false;
		}
	}
	
	// Discover
	if(document.paidform.CARD_TYPE.selectedIndex == 4)
	{
		if (!isDiscover(stripWhitespace(document.paidform.CARD_NUMBER.value)))
		{
			alert("Invalid credid card number. Please re-enter.")
        		document.paidform.CARD_NUMBER.focus();
			return false;
		}
	}

	if(!checkDropdown(document.paidform.ExpMon))
	{
 		alert('Please select the expiration month.');
		document.paidform.ExpMon.focus();
 		return false;
	}

	if(!checkDropdown(document.paidform.ExpYear))
	{
 		alert('Please select the expiration year.');
		document.paidform.ExpYear.focus();
 		return false;
	}
var d, month, year;
   	d = new Date();
    
	month = d.getMonth() + 1;
	year = d.getFullYear() - 2000;
	if (document.forms[0].ExpYear[document.forms[0].ExpYear.selectedIndex].value < year)
	{
 		alert('Invalid Expiration date.');
		document.forms[0].ExpYear.focus();
 		return false;
	}
	else
	{
		if (document.forms[0].ExpYear[document.forms[0].ExpYear.selectedIndex].value == year)
		{
			if (document.forms[0].ExpMon[document.forms[0].ExpMon.selectedIndex].value < month)
			{
 				alert('Invalid Expiration date.');
				document.forms[0].ExpMon.focus();
 				return false;
			}
		}
	}
	if(document.paidform.SCODE.value == "")
	{
		alert('Please enter security code.');
		document.paidform.SCODE.focus();
		return false;
	}

	return true;
}
function checkDropdown(selectBox)
{
	if(selectBox.selectedIndex == "0")
	{
		return false;
	}
	else
	{
		return true;
         }
}



function checkUnselects(radioItem)
{
	for(i=0;i<radioItem.length;i++)
	{
		if(radioItem[i].checked)
		{
			return true;
		}//end if
	}//end for
	return false;
}
//
//
// declare global variables
var i;

// two arrays for Canadian province/postal code validation
var CanCodes=new Array("54","55","56","57","58","59","60","66","61","62","63","64","65");
var CanLetters=new Array("T","UV","R","E","A","B","X","X","KLMNP","C","GHJ","S","Y");

// check if first letter of postal code matches selected Canadian province
// StateCD is 2-digit code that Omeda uses to identify Canadian provinces (value of STATE field)
// PostCD is entered postal code (value of ZIPCODE field)
function ValidCanPostal(StateCD, PostCD)
{
	var fletter=PostCD.substring(0,1);
	fletter = fletter.toUpperCase();

	for(i=0;i<13;i++)
	{
		if (StateCD==CanCodes[i])
		{
			if (CanLetters[i].indexOf(fletter,0) == -1)
			{
				return false;
			}
			else
			{
				return true;
			}
		}
	}
	return true;
}
function IsCanadian(StateCD)
{
	for(i=0;i<13;i++)
	{
		if (StateCD==CanCodes[i])
		{
			return true;
		}
	}
	return false;
}

function checkEmailValue(emailValue)
{     //runs the validate script and returns error box or nonerror

	if (emailValue == "")
	{
		alert("You have not entered email address. Please re-enter it.");
		return false;
	}

	startPos = 0;

	commaPos = emailValue.indexOf(",",startPos+1);	//position of semicolomn
	while (commaPos != -1)
	{
		endPos = commaPos;
		emailElement = emailValue.substring(startPos,endPos);
		if(!validEmail(emailElement))
		{
			alert("You have entered an invalid email address. Please re-enter it.");
			return false;
		}
		startPos = endPos + 1;		
		commaPos = emailValue.indexOf(",",startPos);	//position of semicolomn
	}
	endPos = emailValue.length;
	emailElement = emailValue.substring(startPos,endPos);

	if(!validEmail(emailElement))
	{
		alert("You have entered an invalid email address. Please re-enter it.");
		return false;
	}
	return true;		
}				

function validEmail(email)
{
	invalidchars = " /:;"

	if(email == "")
	{			//checks to see if blank field
		return false
	}
			
	for(i=0;i<invalidchars.length;i++){ //checks for invalid chars
			
	badchars = invalidchars.charAt(i)
			
	if(email.indexOf(badchars,0)!= -1)
	{
		return false
	}	
													}
	
	atPos = email.indexOf("@",1)  //holds position of "@"
			
	if(atPos == -1) 
	{	//checks to see if "@" present
		return false
	}
							
	if(email.indexOf("@",atPos+1) != -1) 
	{ //checks for second "@"
		return false
	}
							
	periodPos = email.indexOf(".",atPos) //holds position of "."
			
	if(periodPos == -1)
	{ //checks for presence of "."
		return false
	}
	if(periodPos+3 > email.length)
	{//makes sure at least two chars after the period
		return false
	}
	return true 
}
function AnswerCheck(form)
{ 
	if(form.MAE_NEWSLETTER[0].checked == false && form.MAE_NEWSLETTER[1].checked == false)
	{
		alert ("Please specify whether you wish to receive Military & Aerospace Electronics Newsletter");
        	form.MAE_NEWSLETTER[0].focus();
		return false;
	}
	if (form.DEF_EXEC_NEWSLETTER[0].checked == false && form.DEF_EXEC_NEWSLETTER[1].checked == false)
	{
		alert("Please specify whether you wish to receive Defense Executive Newsletter");
        	form.DEF_EXEC_NEWSLETTER[0].focus();
		return false;
	}

	if (form.MAE_EMBEDDED_NEWS[0].checked == false && form.MAE_EMBEDDED_NEWS[1].checked == false)
	{
		alert("Please specify whether you wish to receive The Embedded Computing Report Newsletter");
        	form.MAE_EMBEDDED_NEWS[0].focus();
		return false;
	}


	if ((form.MAE_NEWSLETTER[1].checked == true) && (form.DEF_EXEC_NEWSLETTER[1].checked == true)&&(form.MAE_EMBEDDED_NEWS[1].checked == true))
	// stop validation when "not to receive" responses
	{
		return true;
	}
	if(form.FNAME.value == "")
	{
		alert("Please specify your First name.");
       		form.FNAME.focus();
		return false;
	}
	if(form.LNAME.value == "")
	{
		alert("Please specify your Last name.");
       		form.LNAME.focus();
		return false;
	}		
	if(form.TITLE.value == "")
	{
		alert("Please specify your Title.");
        form.TITLE.focus();
		return false;
	}
	if(form.COMPANY.value == "")
	{
		alert("Please specify your Company name.");
       		form.COMPANY.focus();
		return false;
	}
	if(form.ADDRESS2.value == "")
	{
		alert("Please specify your Street Address.");
        	form.ADDRESS2.focus();
		return false;
	}		
	if(form.CITY.value == "")
	{
		alert("Please specify your City.");
        	form.CITY.focus();
		return false;
	}

	if (form.STATE.selectedIndex == 0)
	{
		alert("Please specify your State/Province or select 'I am not in the US or Canada'.");
	        form.STATE.focus();
		return false;
	}
	// validate Canadian state/postal code combination
		if (!ValidCanPostal(form.STATE[form.STATE.selectedIndex].value,form.ZIPCODE.value))
		{
			alert ("Invalid Canadian province/postal code combination.");
        		form.STATE.focus();
			return false;
		}

		if (form.STATE[form.STATE.selectedIndex].value == "53")
		{
			if (form.COUNTRY.value == "")
			{
				alert("Please specify your Country.");
	        		form.COUNTRY.focus();
				return false;
			}
		}
		else
		{
			if (form.ZIPCODE.value.length < 5)
			{
				alert("Please specify your Zip/Postal Code.");
	        		form.ZIPCODE.focus();
				return false;
			}
		}	
		
    if(form.EMAIL_ADDRESS.value == "")
	{
		alert("Please specify your E-mail Address.");
       		form.EMAIL_ADDRESS.focus();
		return false;
     }
		if(!validEmail(form.EMAIL_ADDRESS.value))
		{
			alert("You have entered an invalid email address. Please re-enter it.");
			form.EMAIL_ADDRESS.focus();
			return false;
		}	      
		if (form.EMAIL_ADDRESS2.value == "")
	    {
	       alert("Please confirm your email address.");
	       form.EMAIL_ADDRESS2.focus();
	       return false;
	    }
        if(form.EMAIL_ADDRESS.value != form.EMAIL_ADDRESS2.value)
        {
	       alert("Confirmation email address does not match email address.");
	       form.EMAIL_ADDRESS.focus();
	       return false;
        }   

//question 1
        if (!checkDropdown(form.WEB_BUSINESS))
		{
		alert("Please select the nature of your Organization.");
		form.WEB_BUSINESS.focus();
		return false;
		}

//question 2

	if (!checkDropdown(form.WEB_JOB_FUNCTION))
		{
		alert("Please select your primary job function.");
		form.WEB_JOB_FUNCTION.focus();
		return false;
		}
	
	return true;
}		
function CheckedRadioValue(radioItem)
{
	for(i=0;i<radioItem.length;i++)
	{
		if(radioItem[i].checked)
		{
			return radioItem[i].value;
		}//end if
	}//end for
	return false;
}
function ObjectExists(form,fieldname)
{
	for ( i=0; i < form.elements.length; i++)
	{
		if (form.elements[i].name == fieldname)
		{
			return true;
		}
	}
	return false;
}

//Sample issues for digital edition		

function PopupSampleIssue()
{
	window.open("http://www.qmags.com/mae/latest","","height=400, 		width=750,toolbar=no,scrollbars=yes,resizable=yes");
}

// declare global variables
var i;
var Q4_START;
var Q4_END;

// on load calculate indices for all group of checkboxes with 'None of the Above' option
function InitIndex(formindex)
{
	for ( i=0; i < document.forms[formindex].elements.length; i++)
	{
		GetIndex(formindex, "INTEGRATED_CIRCUITS-02");
		Q4_START = i;
           	i++;

		GetIndex(formindex, "PRODUCTS_NONE");
		Q4_END = i;
		i++;

		break;
	}
	ClearSubmitFlag();
}

function GetIndex(formindex, ElemName)
{
	while (document.forms[formindex].elements[i].name != ElemName)
	{
		i++;
	}
}

// This function is running with assumption that 'None of the Above' option is the very last
// in the group of checkboxes.
// Start index must be calculation on when document is being loaded using InitIndex() function
function checker(formindex,start,end,none)
			// formindex - index of the form within current document, starts with 0
			// start - start index for group of checkboxes
			// end - end index for group of checkboxes
			// 'None of the above' - name of 'None of the above' checkbox
{
	var OptionChecked = false;
	var LoopCount = 99;
	var NoneName = none;


	for ( var j=start; j < end; j++)
	{
		while (LoopCount>=0)
		{
			if (document.forms[formindex].elements[j].name == NoneName)
 			{
 				if (OptionChecked == true)
 				{
 					document.forms[formindex].elements[j].checked = false;
 				}
 				LoopCount=0;	//break the loop when reach None option
 			}
 			else
 			{
				if (OptionChecked != true)
				{
 					if (document.forms[formindex].elements[j].checked==true)
 					{
 						OptionChecked = true;
 					}
				}
 			}
			j++;
			LoopCount--;
		}
		break;
	}
}