function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()');
		eval(imgObj+'.src = "'+imgSrc+'"');
	}
}
function changeImage(layer,imgName,imgObj) {
	if (document.images) {
		if (document.layers && layer!=null) eval('document.images["'+imgName+'"].src = '+imgObj+'.src');
		else document.images[imgName].src = eval(imgObj+".src");
	}
}
preload('background1','../img/hp-bg.gif');
preload('background2','../img/bg.gif');
preload('aboutOff','../img/top-about-off.gif');
preload('aboutOn','../img/top-about-on.gif');
preload('contactOff','../img/top-contact-off.gif');
preload('contactOn','../img/top-contact-on.gif');
preload('grayhillOff','../img/top-grayhill-off.gif');
preload('grayhillOn','../img/top-grayhill-on.gif');
preload('featureOff','../img/hp-feature-off.gif');
preload('featureOn','../img/hp-feature-on.gif');
preload('passwordOff','../img/hp-password-off.gif');
preload('passwordOn','../img/hp-password-on.gif');
preload('homeOff','../img/top-home-off.gif');
preload('homeOn','../img/top-home-on.gif');
preload('solutionsHomeOff','../img/hp-solutions-off.gif');
preload('solutionsHomeOn','../img/hp-solutions-on.gif');
preload('processHomeOff','../img/hp-process-off.gif');
preload('processHomeOn','../img/hp-process-on.gif');
preload('technologiesHomeOff','../img/hp-technologies-off.gif');
preload('technologiesHomeOn','../img/hp-technologies-on.gif');
preload('solutionsMenuOff','../img/mn-solutions-off.gif');
preload('solutionsMenuOn','../img/mn-solutions-on.gif');
preload('processMenuOff','../img/mn-process-off.gif');
preload('processMenuOn','../img/mn-process-on.gif');
preload('technologiesMenuOff','../img/mn-technologies-off.gif');
preload('technologiesMenuOn','../img/mn-technologies-on.gif');