function addOption(objSelectNow,txt,val,defaultvalue,selectedvale)
{
	var objOption = document.createElement("OPTION");
	objOption.text= txt;
	objOption.value=val;
	objOption.Selected=selectedvale;
	if(selectedvale)
	{
		objSelectNow.options.add(new Option(txt,val,'',true));
	}
	else
	{
		objSelectNow.options.add(new Option(txt,val));
	}
}
function addOptionGroup(selectId,optGroupString,selectnum){
	var optGroup = optGroupString.split(",");
	var objSelect = document.getElementsByTagName("SELECT");
	var objSelectNow = objSelect[selectId];
	objSelectNow.length = 1;
	
	for (i=1; i<optGroup.length-1; i=i+2)
	{
		if(optGroup[i]==selectnum)
		{

			addOption(objSelectNow, optGroup[i+1], optGroup[i],true,true);
		}
		else
		{

			addOption(objSelectNow, optGroup[i+1], optGroup[i],false,false);
		}
	}
}
function removeOptions(selectObj)
{
    if (typeof selectObj != 'object')
    {
        selectObj = document.getElementById(selectObj);
    }
    var len = selectObj.options.length;
    for (var i=0; i < len; i++)
    {
        selectObj.options[0] = null;
    }
}