var xmlHttp

function getSubCategories(ID,selOptions)
{
var srcLength = selOptions.options.length; 
for(var i=0;i<srcLength;i++)
selOptions.options.remove(i);

xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="admin/getSubCategory.asp";
url=url+"?ID="+ID;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
} 

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
	strResult = xmlHttp.responseText;
	optionNew = new Option('Select Sub Category','0')
	document.getElementById("cmbSubCategory").options[0] = optionNew
	strOpt = strResult.split("@") 
	var l = strOpt.length; 
	for(var index=1;index<l;index++)
	{
		strSubOpt = strOpt[index-1].split("~");	
		optionNew = new Option(strSubOpt[1],strSubOpt[0])
		document.getElementById("cmbSubCategory").options[index] = optionNew
	}	
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}