asp有象VB的combo控件一样的可以手动修改内容的下拉框码？

// create the text object

//------------------------------------------------------------------------------------------------------

var txtObjIdName = objId + "_text";

if (document.all[txtObjIdName] != null)

{

strMsg="The following id: "" + txtObjIdName +"" is used internally by the Combo Box!\r\n"+

"Use of this id in your page may cause malfunction. Please use another id for your controls.";

alert(strMsg);

}

var txtInner = "<INPUT type="text" id=" + txtObjIdName + " name=" + txtObjIdName +

" onblur="" + objHandler + ".loseFocus()" " +

" style="display: none; position: absolute" value="" >";

this.comObj.insertAdjacentHTML("afterEnd", txtInner);

this.txtObj = document.all[txtObjIdName];

//------------------------------------------------------------------------------------------------------