// JavaScript Document

function popup(pop_up, x, y){
	var objPop = document.getElementById(pop_up);
	var objSite = document.getElementById("site");
	objPop.style.visibility = (objPop.style.visibility == 'visible') ? 'hidden' : 'visible';
	leftPos = (document.body.clientWidth - x) / 2;
	objPop.style.left = leftPos + 'px';
	objPop.style.top = y + 'px';
}