function pop_up(url,win_width,win_height) {
	url = 'popups/'+url+'.html';
	day = new Date();
	id = day.getTime();
	eval("page" + id + " = window.open(url, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width='+win_width+',height='+win_height+'');");
}