//code for opening calender in popup
function openCalendar(FormElement){
	var calendarwindow;
	url = "calendar.html?formname=iform&formelement=" + FormElement;
	calendarwindow = window.open(url,"thewindow","toolbar=no,LEFT=100,TOP=400,WIDTH=170,HEIGHT=140,status=no,scrollbars=no,resize=no,menubar=no");
	calendarwindow.focus();
}

//to check valid email
function checkemail(email)
{
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=email.match(emailPat);
	if (matchArray==null) {
	return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
	if (user.charCodeAt(i)>127) {
	return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
	if (domain.charCodeAt(i)>127) {
	return false;
	   }
	}
	if (user.match(userPat)==null) {
	return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
	for (var i=1;i<=4;i++) {
	if (IPArray[i]>255) {
	return false;
	   }
	}
	return true;
  }

	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
	if (domArr[i].search(atomPat)==-1) {
	return false;
	   }
	}
	if (checkTLD && domArr[domArr.length-1].length!=2 && 
	domArr[domArr.length-1].search(knownDomsPat)==-1) {
	return false;
	}
	if (len<2) {
	  return false;
	   }
	  return true;
}

function valid_email()
{
	if(document.specialoffer.txtemailid.value == "")
 	{
		alert("Please enter email-address");
		return false;
 	}
		
	 if(document.specialoffer.txtemailid.value!="")
	 {
		 if(!checkemail(document.specialoffer.txtemailid.value))
			{  
				alert("Not valid email address");
				return false;
			}
	 }
	 return true;
}