引用了系统的颜色对话框如何判断是按了取消返回的呢

[suhuoqiang]

<OBJECT id="dlgHelper" height="0px" width="0px" classid="clsid:3050f819-98b5-11cf-bb82-00aa00bdce0b" VIEWASTEXT>

如何判断呢

[hrong]

<SCRIPT language=javascript>
var sInitColor = null;
function callColorDlg()
{
if (sInitColor == null)
var sColor = dlgHelper.ChooseColorDlg();
else
var sColor = dlgHelper.ChooseColorDlg(sInitColor);
sColor = sColor.toString(16);
if(sColor==0)alert("你按了取消或者选择了缺省值!!");
if (sColor.length < 6)
{
var sTempString = "000000".substring(0,6-sColor.length);
sColor = sTempString.concat(sColor);
}
document.body.bgColor = sColor;
}
</SCRIPT>
<OBJECT id=dlgHelper CLASSID="clsid:3050f819-98b5-11cf-bb82-00aa00bdce0b" width=0 height=0></OBJECT>
<input type=button value="请选择颜色" onclick="callColorDlg()">