JS选择颜色

<script>
var sInitColor = null;
function callColorDlg(obj){
if (sInitColor == null)
var sColor = dlgHelper.ChooseColorDlg();
else
var sColor = dlgHelper.ChooseColorDlg(sInitColor);
   sColor = sColor.toString(16);
if (sColor.length < 6) {
var sTempString = "000000".substring(0,6-sColor.length);
sColor = sTempString.concat(sColor);
}
if(sColor!="000000"){
sColor = "#" + sColor;
obj.value=sColor;
obj.style.backgroundColor=sColor;
}}
</script>
<OBJECT id=dlgHelper CLASSID="clsid:3050f819-98b5-11cf-bb82-00aa00bdce0b" width="0px" height="0px"></OBJECT>

背景色：<input size="8" onClick="callColorDlg(this)" />