// check email for correct format
	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 address")
		return false
		}

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

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

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

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

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


function validate(){
	if (document.Register.First_Name.value.length < 2){
		alert ("Please enter your first name.");
		document.Register.First_Name.focus();
		return false;
	}
	if (document.Register.Last_Name.value.length < 2){
		alert ("Please enter your last name.");
		document.Register.Last_Name.focus();
		return false;
	}	
	var emailID=document.Register.Email	
	
	//if ((emailID.value!=null)||(emailID.value!="")){
	if (emailID.value!=""){
	
		if (echeck(emailID.value)==false){
			emailID.value="";
			emailID.focus();
			return false;
		}
	}
	if (document.Register.Class.value == 0){
		alert ("Please select from the list of classes");
		document.Register.Class.focus();
		return false;
	}

	return true;				
	}