function openWindow(mypage, myname, w, h)
{

var winl = screen.availWidth - Math.floor( (screen.availWidth) * .70);
var wint = screen.availHeight - Math.floor( (screen.availHeight) * .70);
var winw = Math.floor( (screen.availWidth) * .70);
var winh = Math.floor( (screen.availHeight) * .70);

winprops = "height="+winh+",width="+winw+",top="+winl+",left="+wint+",location=yes,menubar=yes,status=yes,toolbar=yes,scrollbars=yes,resizable=yes";
win = window.open(mypage, myname, winprops);
win.focus();
}