window.onload = function ()
{
document.getElementById("subscriberName").value="";
document.getElementById("subscriberEmail").value="";
}

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("Please check your e-mail address")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please check your e-mail address")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Please check your e-mail address")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Please check your e-mail address")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Please check your e-mail address")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Please check your e-mail address")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Please check your e-mail address")
		    return false
		 }

 		 return true					
	}

function subscribeFields(){
if (document.getElementById("subscriberName").value == ""){
alert("Please enter your 'First Name'");
document.getElementById("subscriberName").focus();
return false;
}
	var emailID=document.newsletterNavSignup.subscriberEmail
   // checks the whole e-mail address string
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please enter your e-mail address")
		emailID.focus()
		return false
	}
   // sets the focus on the e-mail address field if values are not correct
	if (echeck(emailID.value)==false){
		emailID.focus()
		return false
	}
   return true
}