// code snippet for achieving PNG alpha transparency in Win IE 5.5+
if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
	window.attachEvent("onload", alphaBackgrounds);
}

function alphaBackgrounds(){
	var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
	var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);
	for (i=0; i<document.all.length; i++){
		var bg = document.all[i].currentStyle.backgroundImage;
		if (itsAllGood && bg){
			if (bg.match(/\.png/i) != null){
				var mypng = bg.substring(5,bg.length-2);
				document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='scale')";
				document.all[i].style.backgroundImage = "url('/_img/x.gif')";
			}
		}
	}
}



function check(form) {
	


	if (form.name.value == "") 
	{
		alert("Please enter your name.")
		form.name.focus();
		return;
	}

	if (form.email.value == "") 
	{
		alert("Please enter your email address.")
		form.email.focus();
		return;
	}

var stremail=form.email.value
var emailchar=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i

	if (!emailchar.test(stremail)) {
	alert("Please enter a valid email address.");
	form.email.focus();
	return
	}		
	
	if (form.comments.value == "") 
	{
		alert("Please type a comment or question.")
		form.comments.focus();
		return;
	}
	else
	{
		form.submit();
	}
}