// JavaScript Document
function addOption(selectId, optionId, txt, val)
{
    var objOption = new Option(txt,val);
    if(val == "-1")
    {
        objOption.setAttribute("Selected", "true");
    }
    objOption.id = optionId;
    document.getElementById(selectId).options.add(objOption);
}

function emptryDropdown(selectId)
{
    obj = document.getElementById(selectId);
    while(obj.hasChildNodes() == true)
    {
        obj.removeChild(obj.childNodes[0]);
    }
}