function roll_over(img_name, img_src) {
   document[img_name].src = img_src;
}

image1 = new Image();
image1.src = "/layouts/debondo/images/home-over.png";
image2 = new Image();
image2.src = "/layouts/debondo/images/about-us-over.png";
image3 = new Image();
image3.src = "/layouts/debondo/images/services-over.png";
image4 = new Image();
image4.src = "/layouts/debondo/images/client-login-over.png";
image5 = new Image();
image5.src = "/layouts/debondo/images/contact-over.png";

function checkLogin(form) {
foundError = false; 
genError = "";
	if(form.username.value == ""){
		genError = "Please enter a username.\r";
		foundError = true;
	}
	if(form.password.value == ""){
		genError = "Please enter a password.\r";
		foundError = true;
	}
	if(foundError == false) {
		return true;
	}
	else {
		errorMessage = genError;
		alert (errorMessage);
		return false;                       
	}   
}