function LoginFormCheck()
{ 
	if (document.forms[0].HAVE_RDRNUM[0].checked == false && document.forms[0].HAVE_RDRNUM[1].checked == false)
	{
		alert ("Please select one of the options.");
        	document.forms[0].HAVE_RDRNUM[0].focus();
		return false;
	}
	if (document.forms[0].HAVE_RDRNUM[0].checked == true)
	{
		if  (document.forms[0].RDRNUM.value == "")
		{
			alert ("Please enter your account number.");
      				document.forms[0].RDRNUM.focus();
			return false;
		}
		if ( document.forms[0].LNAME_FIRST4.value == "")
		{
			alert ("Please enter first 4 letters of your last name.");
	       		document.forms[0].LNAME_FIRST4.focus();
			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 (ObjectExists(document.forms[0], "REQUESTED_VERSION"))
	{
		if (!CheckUnselects(document.forms[0].REQUESTED_VERSION)) 
		{ 
			alert("Please specify how you would like to receive your copy of Hydro Review.");
			var myFocus=document.getElementById("REQUESTED_VERSION");
			myFocus.scrollIntoView(true); 
			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 (!CheckDropdown(document.forms[0].PERSONAL_ID))
		{
			alert("Please select your Personal Identifier");
	        	document.forms[0].PERSONAL_ID.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 (ObjectExists(document.forms[0], "REQUESTED_VERSION" ))
	{
                
           if (CheckedRadioValue(document.forms[0].REQUESTED_VERSION)=="P")
	   {
            if (IsCanadian(document.forms[0].STATE.value)||(document.forms[0].COUNTRY[document.forms[0].COUNTRY.selectedIndex].value =="MEXICO")|| (document.forms[0].STATE.selectedIndex < 53))
			{
				alert("North American subscribers must request the digital edition to receive a free subscription.");
	        		document.forms[0].REQUESTED_VERSION[0].focus();
				return false;
        		}
	   }
     }
	
	if (!CheckDemos(document.forms[0]))
	{
		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 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 ValidNum(NumObj)
{
	var myNum, cleanNum;
	
	myNum = NumObj.value
	cleanNum = parseInt(myNum);

	if ( myNum == "")
	{
		return true;
	}
       	if(myNum != cleanNum)
	
	{
		alert("You have entered an invalid number for Personal ID question.Please re-enter.");
		NumObj.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;
}

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 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 == "")
	{
		alert ("Please specify your E-mail Address.");
       		document.paidform.EMAIL_ADDRESS.focus();
		return false;
    	}
        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.toUpperCase() != paidform.EMAIL_ADDRESS2.value.toUpperCase())
        {
	       alert("Confirmation email address does not match email address.");
	       paidform.EMAIL_ADDRESS.focus();
	       return false;
        }   
	if(!CheckUnselects(document.paidform.PAY_STAT))
	{
		alert("Please specify payment method.");
        	document.paidform.PAY_STAT[0].focus();
		return false;
	}  
	if(document.paidform.PAY_STAT[1].checked)
	// check payment info if PAY_STAT=2
	{
		if (!CheckBillAddress())
		{
			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.value == "")
		{
			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 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.selectedIndex == 0)
		{
			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 credit 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 credit 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 credit 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;
	}
	// zh
	return true;
}

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;
	}
	if ((document.forms[0].send_to_3.value != "") && (!validEmail(document.forms[0].send_to_3.value)))
	{
		alert("You have entered an invalid email address. Please re-enter it.");
		document.forms[0].send_to_3.focus();		
		return false;
	}
	if ((document.forms[0].send_to_4.value != "") && (!validEmail(document.forms[0].send_to_4.value)))
	{
		alert("You have entered an invalid email address. Please re-enter it.");
		document.forms[0].send_to_4.focus();		
		return false;
	}

	return true;		
}

//Sample issues for digital edition 

function PopupSampleIssue()
{
	window.open("http://www.qmags.com/OLHit.asp?pub=HRW&upid=14326&s=PW&url=http://online.qmags.com/HRW0309","","height=400, width=750,toolbar=no,scrollbars=yes,resizable=yes");
}

function ObjectExists(form,fieldname)
{
	for ( i=0; i < form.elements.length; i++)
	{
		if (form.elements[i].name == fieldname)
		{
			return true;
		}
	}
	return false;
}
function IsCanadian(StateCD)
{
	for(i=0;i<13;i++)
	{
		if (StateCD==CanCodes[i])
		{
			return true;
		}
	}
	return false;
}