/*Email validation portion of This script available free online at
The JavaScript Source!! http://javascript.internet.com 
V1.1.3: Sandeep V. Tamhankar (stamhankar@hotmail.com)*/
function emailCheck (emailStr) {
	var checkTLD=1;
	//var formname = "document.forms[0]" //undid for this ver
	var formname = "studenthelp"
	var fieldname = "FromEmail"
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|tv)$/;
	var emailPat=/^(.+)@(.+)$/;
	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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert("Email contains invalid characters");
		studenthelp.FromEmail.focus()
		studenthelp.FromEmail.select()
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert("Email contains invalid characters");
			studenthelp.FromEmail.focus()
			studenthelp.FromEmail.select()
			return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert("Email contains invalid characters");
			studenthelp.FromEmail.focus()
			studenthelp.FromEmail.select()
			return false;
		   }
	}
	if (user.match(userPat)==null) {
		alert("Email contains invalid characters");
		studenthelp.FromEmail.focus()
		studenthelp.FromEmail.select()
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Email contains invalid characters");
				studenthelp.FromEmail.focus()
				studenthelp.FromEmail.select()
				return false;
		   }
		}
	return true;
	}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert("Email contains invalid characters");
			studenthelp.FromEmail.focus()
			studenthelp.FromEmail.select()
			return false;
		   }
	}
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("Domain portion of email address is incorrect");
		studenthelp.FromEmail.focus()
		studenthelp.FromEmail.select()
	return false;
	}
	if (len<2) {
		alert("Email address is incorrect");
		studenthelp.FromEmail.focus()
		studenthelp.FromEmail.select()
	return false;
	}
return true;
}