function winOpen(x,y,urlname){
	url = urlname;
	winwidth = x
	winheight = y
	sw = screen.availWidth;
	sh = screen.availHeight;
	wl = (sw - winwidth)/2;
	wt = (sh - winheight)/2;
	win = window.open(url,"","width=" + winwidth + ",height=" + winheight + ",,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,left="  + wl + ",top=" + wt);
};