var popupHandle = new Array();
    var iTotalPopup = 0;
	
	function popup(URL, pWidth, pHeight)
  	{       
		var iHandle = window.open(URL,'_blank','width=' + pWidth + ',height=' + pHeight + ',toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=auto,copyhistory=no,resizable=yes');
		popupHandle[ iTotalPopup++ ] = iHandle;
		return true;
  	}
	
	function isValidEmail (emailStr) 
	{	
		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 address seems incorrect (check @ and .'s)")
			return false;
		}
		var user=matchArray[1]
		var domain=matchArray[2]

		if (user.match(userPat)==null) {    
			alert("The username doesn't seem to be valid.")
			return false
		}

		var IPArray=domain.match(ipDomainPat)
		if (IPArray!=null) {
				for (var i=1;i<=4;i++) {
					if (IPArray[i]>255) {
						alert("Destination IP address is invalid!");
					return false;
					}
			}
			return true;
		}

		// Domain is symbolic name
		var domainArray=domain.match(domainPat)
		if (domainArray==null) {
			alert("The domain name doesn't seem to be valid.");
			return false;
		}

		var atomPat=new RegExp(atom,"g");
		var domArr=domain.match(atomPat);
		var len=domArr.length;
		if (domArr[domArr.length-1].length<2 || 
			domArr[domArr.length-1].length>3) {   
			alert("The address must end in a three-letter domain, or two letter country.");
			return false;
		}

		if (len<2) {
			var errStr="This address is missing a hostname!";
			alert(errStr);
			return false;
		}

		// If we've gotten this far, everything's valid!
		return true;
	}