//menu script
	function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}
	
	function changeImages() {
		if (document.images && (preloadFlag == true)) {
			for (var i=0; i<changeImages.arguments.length; i+=2) {
				document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
			}
		}
	}
	
	var preloadFlag = false;
	function preloadImages() {
		if (document.images) {
			home_over = newImage("images/home-over.jpg");
			services_over = newImage("images/services-over.jpg");
			industries_over = newImage("images/industries-over.jpg");
			aboutus_over = newImage("images/aboutus-over.jpg");
			contactus_over = newImage("images/contactus-over.jpg");
			preloadFlag = true;
		}
	}
	
	//validate contact form
	function cval() {
		var Name = document.contact.name.value;
		var Phone = document.contact.phone.value;
		var Email = document.contact.email.value;
		var emailReg = /^.+?@.+?\..+$/;
		
		if (Name == "") {
			alert("Please enter your full name");
			return false;
		}
		if (Phone == "") {
			alert("Please enter your phone number");
			return false;
		}
		if ((Email == "") || (!Email.match(emailReg))) { 
			alert("Please enter a valid email address"); 
			return false; 
		}
		else { 
			return true; 
		}
	}
	
	//validate contact form
	function qval() {
		var Fname = document.quote.fname.value;
		var Lname = document.quote.lname.value;
		var Cname = document.quote.cname.value;
		var Phone = document.quote.phone.value;
		var Email = document.quote.email.value;
		var emailReg = /^.+?@.+?\..+$/;
		
		if (Fname == "") {
			alert("Please enter your first name");
			return false;
		}
		if (Lname == "") {
			alert("Please enter your last name");
			return false;
		}
		if (Cname == "") {
			alert("Please enter your company name");
			return false;
		}
		if (Phone == "") {
			alert("Please enter your phone number");
			return false;
		}
		if ((Email == "") || (!Email.match(emailReg))) { 
			alert("Please enter a valid email address"); 
			return false; 
		}
		else { 
			return true; 
		}
	}