image1 = new Image();
image1.src = "images/nav_services_on.gif";

image2 = new Image();
image2.src = "images/nav_process_on.gif";

image3 = new Image();
image3.src = "images/nav_portfolio_on.gif";

image4 = new Image();
image4.src = "images/nav_contact_on.gif";

function navMouseOver(item) {
	document.images[item].src= "images/"+item+"_on.gif";
}

function navMouseOut(item) {
	document.images[item].src= "images/"+item+"_off.gif";
}

function popper(popName) {
	xWindow=window.open([popName], 'popup','toolbar=no,width=440,height=300,directories=no,status=no,scrollbars=yes,resize=no,menubar=no,left='+(screen.availWidth/2-220)+',top='+(screen.availHeight/2-150)+'');
}