function imgChanger(elemId,imgSrc) {
	if (document.getElementById(elemId)){
		document.getElementById(elemId).src = imgSrc;
	}
}


function openWindow(loc){
	window.open(loc,"Popup","width=610px,height=500px,toolbar=no,status=no,scrollbars=yes,location=no,menubar=no,directories=no,resizable=yes");
}


function checkEmail(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) {
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	
	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 domainArray=domain.match(domainPat);
	if (domainArray==null) {
    	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) {
		return false;
	}
	
	if (len<2) {
		return false;
	}
	
	return true;
}


function sendForm(formName,loc){
	document.forms[formName].action		= loc;
	document.forms[formName].submit();
}