/***********************************************
* DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
* ---------------------------------------

*Modified by Marian Zamfirescu, Apr 2006 to add multiple email validation with , separator 
***********************************************/
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){
	   return false
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   return false
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		return false
	}
	 if (str.indexOf(at,(lat+1))!=-1){
		return false
	 }
	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		return false
	 }
	 if (str.indexOf(dot,(lat+2))==-1){
		return false
	 }
	 if (str.indexOf(" ")!=-1){
		return false
	 }
	 return true					
}
function multiEmail(email_field) {
	var parseString = document.getElementById(email_field).value;
	var email = parseString.split(', ');
	for (var i = 0; i < email.length; i++) {
		if (!echeck(email[i])) {
			alert('Error: One or more email addresses entered is invalid. Also make sure multiple emails are separated by a , and a space.');
			return false;
			}
	}
	return true;
}