var isIE = document.all ? 1 : 0;
var isNS4 = document.layers ? 1 : 0;

function isValidEmail(emailStr) {   
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|gov|biz|name|info|museum|family)$/;
	var emailPat=/^(.+)@(.+)$/;
	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) {
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];

	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
		return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			return false;
		}
	}
	if (user.match(userPat)==null) return false;
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) 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) 	return false;
	}
	if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) return false;
	if (len<2) return false;
	return true;
}

function sfo() {
	Form = document.forms[0];
	for (i=0; i<Form.length; i++) {
		if (Form.elements[i].type != 'hidden') {
			Form.elements[i].focus(); break;
		}
	}
}

var newwin
function launchWin(url, name, height, width, scroll, align) {
  var str = "height=" + height + ",innerHeight=" + height;
  str += ",width=" + width + ",innerWidth=" + width;
  if (scroll==true) str += ",scrollbars=yes";
  if (window.screen) {
    var ah = screen.availHeight - 30;
    var aw = screen.availWidth - 10;

    if (align=='_left') {
		var xc = 0;
		var yc = (ah - height) / 2;
	}
	else if (align=='_center') {
		var xc = (aw - width) / 2;
		var yc = (ah - height) / 2;
	}
	else if (align=='_right') {
		var xc = (aw - width);
		var yc = (ah - height);
	}
    str += ",left=" + xc + ",screenX=" + xc;
    str += ",top=" + yc + ",screenY=" + yc;
  }
  return window.open(url, name, str+=",resizable=1");
}