function bgToWhite(id){
 document.getElementById(id).style.color="#C0C0C0";
}
function bgToDark(id){
	document.getElementById(id).style.color="black";
}
function open_w(URL,info,w,h){
 var x = (window.screen.width - w)/2;
 var y = (window.screen.height - h) /2.5; 
www=window.open(URL,info,'width='+w+',height='+h+',top='+y+',left='+x+',toolbar=no,personalbar=no,location=no,directories=no,statusbar=no,menubar=no,status=no,resizable=no');
}
function getID(id) {
	return document.getElementById(id);	
}

function showID(id) {
	getID(id).style.display = "block";
}

function hideID(id) {
	getID(id).style.display = "none";
}