function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
//		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
//		   alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
//		    alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
//		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
//		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
//		    alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
//		    alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
	}

function fillit()
{
	if (document.f1.email.value=="Enter Your Email")
	{
		document.f1.email.value="";
	}	
}

function checkit()
{
	if (document.f1.email.value=="")
	{
	document.f1.email.value="Enter Your Email";
	}
}

function popup()
//var emailID=document.f1.email.value();
{
	if ((document.f1.email.value!="") && (document.f1.email.value=="Enter Your Email"))
	{
	alert("Please enter your email")
	return false;
	}
	
	else if (echeck(document.f1.email.value)==false)
	{
//		document.f1.email.value=""
//		document.f1.email.focus()
		alert("Invalid Email ID")
		return false;

	}
	
	else
	{
document.f1.submit();
//window.open("http://69.72.254.242/~tempst/popup.php", "popup", 'width=300,height=200,left=300,top=250,scrollbars=no,navigation=yes status=no');
	}
}





/*
function sortOfSubmit()
{
var url='send_email.asp?';
url+='field=' + urlencode(form.field.value);
url+='&other=' + urlencode(form.other.value);
// ...
window.open(url,null,'width=450,
height=225, status=no, directories=no, toolbar=no, location=no,
menubar=no,scrollbars=no, resizable=no')

}
//<input type='button' value='sort of submit' onclick='sortOfSubmit()'>

*/