var myRequest; 
function getXMLHTTPRequest() { 
    var myRequest = null; 
    if(window.XMLHttpRequest){   // firefox 
        myRequest = new XMLHttpRequest();  
    }else if(typeof ActiveXObject != "undefined"){  // IE 
        myRequest = new ActiveXObject("Microsoft.XMLHTTP"); 
    }           
    return myRequest;           
}

 
function getServiceText() {      
	var t_value = "";
    myRequest = getXMLHTTPRequest(); 
    if(myRequest) {          
        try  { 
            myRequest.open( "post", "./getSession.jsp", false); 
        } catch(exception) { 
        }  
         myRequest.send("test"); 
		 if(myRequest.readyState == 4){ 
		 	t_value = myRequest.responseText;
		 }
    }    
	return t_value;
}