var xmlHttp; 
		var ALPHA_VALUE_="";
		var requestURL = 'ajax/'; 
		var is_ie = (navigator.userAgent.indexOf('MSIE') >= 0) ? 1 : 0; 
		var is_ie5 = (navigator.appVersion.indexOf("MSIE 5.5")!=-1) ? 1 : 0; 
		var is_opera = ((navigator.userAgent.indexOf("Opera 6")!=-1)||(navigator.userAgent.indexOf("Opera/6")!=-1)) ? 1 : 0; 
		var is_netscape = (navigator.userAgent.indexOf('Netscape') >= 0) ? 1 : 0; 
    //query has ?
		function GETVALUE_APHAL(urlxx,query){ 
			if (query.length > 0)
			{ 
				var url = requestURL+urlxx + query; 
				xmlHttp = GetXmlHttpObjectx(stateChangeHandlerx); 
				xmlHttp_Getx(xmlHttp, url); 
			} 
		} 
		//dung ham GETVALUE_FORCHECK do kem voi checkXXX_
		function GETVALUE_FORCHECK(urlxx,query)
		{
			if (query.length > 0)
			{ 
				var url = urlxx + query; 
				xmlHttp = GetXmlHttpObjectx(checkXXX_); 
				xmlHttp_Getx(xmlHttp, url); 
			} 
		}
		//tempate
/*		function checkXXX_()
		{
			if (xmlHttp.readyState == 4 || xmlHttp.readyState == 'complete')
			{ 				
				ALPHA_VALUE_ = xmlHttp.responseText; //getvaluereturn
			}
		}
		*/
		
		function stateChangeHandlerx() 
		{ 
			if (xmlHttp.readyState == 4 || xmlHttp.readyState == 'complete')
			{ 				
				ALPHA_VALUE_ = xmlHttp.responseText; //getvaluereturn
				
			}
				
		} 
		function xmlHttp_Getx(xmlhttp, url) { 
			xmlhttp.open('POST', url, true); 
			xmlhttp.send(null); 
		} 

		function GetXmlHttpObjectx(handler) { 
			var objXmlHttp = null;    //Holds the local xmlHTTP object instance 
			if (is_ie){ 
				var strObjName = (is_ie5) ? 'Microsoft.XMLHTTP' : 'Msxml2.XMLHTTP'; 
	             
			try{ 
					objXmlHttp = new ActiveXObject(strObjName); 
					objXmlHttp.onreadystatechange = handler; 
				} 
				catch(e){ 
					alert('IE detected, but object could not be created. Verify that active scripting and activeX controls are enabled'); 
					return; 
				} 
			} 
			else if (is_opera){ 
				alert('Opera detected. The page may not behave as expected.'); 
				return; 
			} 
			else{ 
				objXmlHttp = new XMLHttpRequest(); 
				objXmlHttp.onload = handler; 
				objXmlHttp.onerror = handler; 
			} 
			return objXmlHttp; 
		}