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

<script>
var tempColor = "0099cc";
function returnColor(){
var Hcolor = dlgHelper.ChooseColorDlg(tempColor).toString(16);
with(event.srcElement){
value = ((Hcolor.length<6)?"000000".substring(0,6-Hcolor.length):"") + Hcolor;
style.backgroundColor = ((Hcolor.length<6)?"000000".substring(0,6-Hcolor.length):"") + Hcolor;
}
tempColor = Hcolor
}
</script>
<input type="text" value="#0099CC" size="12" onclick="returnColor()" style="background-color: #0099CC">

将代码复制到 .html 文件中用浏览器打开查看效果。