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 ((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;
	}	
	
	if (!CheckPaymentInfo())
	{
		//alert(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;
		}
	}
	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;
	}
	// zh
	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 formCheck(mode, description)
{ 
	if(document.forms[0].RECEIVE_YES_NO[0].checked == false && document.forms[0].RECEIVE_YES_NO[1].checked == false)
	{
	alert("Please specify whether you wish to receive " + description +"?");
        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 edition you would like to receive.");
        	document.forms[0].REQUESTED_VERSION[0].focus();
		return false;
	}
       	
	if ((mode == "SHORT") || (mode == "ABBR"))
	{	
		if ((document.forms[0].EMAIL_ADDRESS.value != "") && (!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;
		}	
		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.getElementById("us_state"))
		{
			if (document.forms[0].STATE.selectedIndex == 0)
			{
				alert("Please specify your State/Province.");
				document.forms[0].STATE.focus();
				return false;
			}
			if (document.forms[0].ZIPCODE.value.length < 5)
			{
				alert("Please specify your Zip/Postal Code.");
	        		document.forms[0].ZIPCODE.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.getElementById("intl_state"))
		{
			if (document.forms[0].COUNTRY.value == "")
			{
				alert("Please specify your Country.");
	        		document.forms[0].COUNTRY.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.getElementById("us_phone"))
           {
		if(document.forms[0].PhoneArea.value.length < 3)
	
		{
			alert("Please specify your area code.");
        		document.forms[0].PhoneArea.focus();
			return false;
		}
		if(document.forms[0].PhoneExch.value.length < 3)
		{
			alert("Please specify first three digits of your phone number.");
        		document.forms[0].PhoneExch.focus();
			return false;
		}
		if(document.forms[0].Phone.value.length < 4)
		{
			alert("Please specify the last four digits of your phone number.");
        		document.forms[0].Phone.focus();
			return false;
		}
	}

	if (document.getElementById("intl_phone"))
	{
		if (document.forms[0].PHONE.value == "")
		{
			alert("Please specify your phone number.");
			document.forms[0].PHONE.focus();
			return false;
		} 
	}
	if(CheckedRadioValue(document.forms[0].REQUESTED_VERSION)=="P")
	{
		if (ObjectExists(document.forms[0],"COUNTRY"))
		{
            		if ((document.forms[0].COUNTRY.value != "UNITED KINGDOM"))
            	  	{
				alert("Readers in Europe outside the UK can only receive the magazine digitally - please check the digital edition before proceeding");
				document.qualform.REQUESTED_VERSION[0].focus();
				return false;
			}
        	}
	}
	if (!CheckDemos(document.forms[0]))
	{
		return false;
	}
	
}  
function checkEmailValuePA()
{   //runs the validate script and returns error box or nonerror
	
	if ((document.forms[0].send_to_1.value != "") && (!validEmail(document.forms[0].send_to_1.value)))
	{
		alert("You have entered an invalid email address. Please re-enter it.");
		document.forms[0].send_to_1.focus();
		return false;
	}
	if ((document.forms[0].send_to_2.value != "") && (!validEmail(document.forms[0].send_to_2.value)))
	{
		alert("You have entered an invalid email address. Please re-enter it.");
		document.forms[0].send_to_2.focus();		
		return false;
	}
	
	return true;		
}
function CheckboxChecked(thisform,CheckBoxName)
{
var ChLength = CheckBoxName.length + 1;
var vName = CheckBoxName + "-";

var CBindex = 0;
	for ( i=0; i < thisform.elements.length; i++)
	{
		if (thisform.elements[i].type == "checkbox")
		{
			if (thisform.elements[i].name.substring(0,ChLength)==vName)
			{
				if (CBindex==0) {CBindex = i;}
				if (thisform.elements[i].checked)
				{
					return true;
					break;
				}
			}
		}

	}
	thisform.elements[CBindex].focus();
	return false;
}
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 AnswerCheck(form)
{ 
        if (document.getElementById("info_alert"))
           {
		if (form.INFO_ALERT.checked==false)
		{
 		alert ('Please specify whether you wish to receive Infosecurity Alert (US) Enewsletter.');
		form.INFO_ALERT.focus();
		return false;
		}
        }
	if (document.getElementById("infosec_enews_uk"))
           {
		if (form.INFOSEC_ENEWS_UK.checked==false)
		{
 		alert ('Please specify whether you wish to receive Infosecurity Alert (UK) Enewsletter.');
		form.INFOSEC_ENEWS_UK.focus();
		return false;
		}
        }
        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.COMPANY.value == "")
	{
		alert ("Please specify your Company name.");
        	form.COMPANY.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;
	}
// job_function
       if (!CheckDropdown(form.JOB_FUNCTION))
		{
		alert ("Please select your job function.");
		form.JOB_FUNCTION.focus();
		return false;
		}
// main activity
       if (!CheckDropdown(form.BUSINESS))
		{
		alert ("Please select your company's main activity.");
		form.BUSINESS.focus();
		return false;
		}		
	return true;
}
function ObjectExists(form,fieldname)
{
	for ( i=0; i < form.elements.length; i++)
	{
		if (form.elements[i].name == fieldname)
		{
			return true;
		}
	}
	return false;
}
function showhideJF(JOB_FUNCTION)
{
var jf = (document.qualform.JOB_FUNCTION[document.qualform.JOB_FUNCTION.selectedIndex].value);
if (jf == "98")
   {
    document.getElementById('job_function_other').style.display = "block";
    }
else
  {
    document.getElementById('job_function_other').style.display = "none";
    }
  	
}
function showhideBUS(BUSINESS)
{
var bus = (document.qualform.BUSINESS[document.qualform.BUSINESS.selectedIndex].value);
if (bus == "98")
   {
    document.getElementById('business_other').style.display = "block";
    }
else
  {
    document.getElementById('business_other').style.display = "none";
    }
  	
}