var xmlHttp

function showTopic(str){
	//alert(str)
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
		alert ("Browser does not support HTTP Request")
		return
	} 
	//alert(str)
	var url="ajax/ls_add_topics.php"
	url=url+"?lsCatID="+str
	//alert(url)
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
} 

function stateChanged(){ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
		//alert(xmlHttp.responseText)
		var set;
	    var value;
		var response = xmlHttp.responseText;
		var select = document.list_serves_post.elements['ls_topicID'].options;
		select.length = 0;
		if(response) {		
			
			set = response.split(';');
			for (var i=0; i<set.length; i++) {
				value = set[i].split('|');
				select[i] = new Option(value[1], value[0]);
			}
		} else {
			select[0] = new Option('No Titles','0' );
		}
	} 
} 

function GetXmlHttpObject() { 
	var objXMLHttp=null
	if (window.XMLHttpRequest){
		objXMLHttp=new XMLHttpRequest()
	} else if (window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}