var popup = new Array();

function WindowOpen(file,name,x,y,features) {
	features = features.length ? ","+features : "";
	var pos_x = (screen.availWidth/2)-(x/2);
	var pos_y = (screen.availHeight/2)-(y/2);
	popup[name] = window.open(file, name, "width="+x+",height="+y+",left="+pos_x+",top="+pos_y+features);
	popup[name].moveTo(pos_x, pos_y);
	popup[name].focus();
}