function navover(imgName) {	document[imgName].src = eval(imgName + "over.src"); }
function navoff(imgName) { document[imgName].src = eval(imgName + "off.src"); }
function chgImg(imgField,newImg) { document[imgField].src= eval(newImg + ".src"); }
function popupwin(location,winname,wide,tall,toolbar,scroll) {
	if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion.charAt(22) == "4") && (navigator.appVersion.charAt(24) == "5") && (navigator.appVersion.indexOf("Mac") != -1)) tall += 17;
	if ((navigator.appName == "Netscape") && (navigator.appVersion.indexOf("Mac") != -1) && (navigator.appVersion.charAt(0) >= "5") && (scroll == "yes")) wide += 14;
	leftpos = 0
	toppos = 0
	if (navigator.appVersion.charAt(0) >= "4") {
		leftpos = screen.width/2 - wide/2
		toppos = screen.height/2 - tall/2
	}
	window.open(location, winname, 'width='+wide+',height='+tall+',left='+leftpos+',top='+toppos+',toolbar='+toolbar+',status=yes,scrollbars=yes'+scroll)
}
function valform() {
	with(document.info) {
		var errors = "";
		if (FirstName.value == "") errors += " First Name\n";
		if (LastName.value == "") errors += " Last Name\n";
		if (Company.value == "") errors += " Company Name\n";
		var mailexp = "^([a-zA-Z0-9._-]+)@([a-zA-Z0-9-])+(\.[a-zA-Z0-9-]+)+$";
		if (document.info.Email.value.search(mailexp) == -1) errors += " Valid Email Address\n";
		if ((demo1.checked == false) && (demo2.checked == false) && (demo3.checked == false)) errors += " Specify Software to Demo\n";
		if (errors != "") {
			alert("     Missing Data\n\nPlease fill in the following\nrequired fields:\n=================================\n"+errors+"=================================\n\nThanks.");
			return false;
		} else {
			return true;
		}
	}
}