function ajaxRequest(url,data) {
    Element.show('add-asset-loading');
   var aj = new Ajax.Request(  
   url, {  
    method:'post',  
    parameters: data,  
    onComplete: showResponse  
    }  
   ); 
   
 }
function showResponse(req){
    $('add-asset').innerHTML = req.responseText;
    document.location = '/user_home.php';
}