function showForm(tId)
{
widthW = 800;
heightW = 750;

xW = (screen.width/2)-(widthW/2);
yW = (screen.height/2)-(heightW/2);

window.open(tId, "_blank", "width="+widthW+",height="+heightW+",menubar=no,scrollbars=yes,status=yes,toolbar=no,resizable=yes,top="+yW+",left="+xW);
}