var bordervalue = "1px solid #808080";

function checkMail(eml) {
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	return filter.test(eml);
}

function checkSendEmail(e) {
	if(!e) e = window.event;
	var objEmail = document.getElementById('email');
	var objEmailimg = document.getElementById('emailimg');
	if(objEmail) {
		if(bordervalue == "") { bordervalue = $('download').style.border; }
		var x = objEmail.value;
		if(checkMail(x)) {
			objEmailimg.src = "images/email-ok.png";
		}
		else {
			objEmailimg.src = "images/email-error.png";
		}
	}	
}