function DoCal(elTarget) {
  if (window.showModalDialog) {
    var sRtn;
	sRtn = showModalDialog("script/calendar.htm","","status=no;center=yes;dialogWidth=150pt;dialogHeight=170pt");
	if (sRtn!="")
      elTarget.value = sRtn;
  } else
    alert("Internet Explorer 4.0 or later is required.")
}