function changePic(id, pic)  { 
	var path = "url(images/"+ pic + ".jpg)";
	document.getElementById(id).style.backgroundImage=path; 
} 

function showSub() {
	document.getElementById('mysubmenuarea').style.visibility="visible";
}

function hideSub() {
	document.getElementById('mysubmenuarea').style.visibility="hidden";
}