this is how i set value to a combobox using dwr call,

var reportID = '<%=reportid%>';
var reportName = '<%=reportname%>';
loadReportNames(reportUserID);

function loadReportNames(reportUserID){

    CustomiseReportAction.getReportNames(reportUserID, addReportNamesDropDown);

}

function addReportNamesDropDown(resultMap){

    dwr.util.removeAllOptions(reportnames);

    dwr.util.addOptions(reportnames,resultMap);

}

after loading the combo box i set values to loaded combo like this,

document.getElementById(reportnames).value=reportID;

but the reportID is not set,

what could be the problem please help me to resolve this.

UPDATE :



function addCombo() {

    var reportID = '<%=reportid%>';

    var reportName = '<%=reportname%>';

    var textb = document.getElementById(reportnames);



    var option = document.createElement(option);

    option.text = reportName;

    option.value = reportID;

    option.selected=selected;

    try {

        textb.add(option, null); //Standard

    }catch(error) {

        textb.add(option); // IE only

    }

    textb.value = ;

}

used above method it gives me no exception but no results.

Regards