function popup( url, x,y) 
{

    x =  x+7;
    y =  y+33;

	ytop = screen.height/2 - y/2;
	xleft = screen.width/2 - x/2;	

    window.open( url, "", "scrolling=auto,width="+x+",height="+y+", top="+ytop+", left="+xleft);
    return false;
}