function ajaxRequest(datapage) {
    var url = datapage; 

    var AJAX = null;                                 
    if (window.XMLHttpRequest) {                    
        AJAX = new XMLHttpRequest();                 
    } else {                                         
        AJAX = new ActiveXObject("Microsoft.XMLHTTP");  
    }                                                
    if (AJAX == null) {                                
        alert("Your browser doesn't support AJAX.");                                                 
        return false                                  
    }
    AJAX.onreadystatechange = function() {                      
        if (AJAX.readyState == 4 || AJAX.readyState == "complete") { 
            ajaxcallback(AJAX.responseText, AJAX.status);             
        }                                                        
    }
    AJAX.open("GET", url, true);                                  
    AJAX.send(null);                                              
}