<!--

   xmlHttpObject = false;
   try{
       // Firefox, Opera 8.0+, Safari
       xmlHttpObject = new XMLHttpRequest();
       if (xmlHttpObject.overrideMimeType) { xmlHttpObject.overrideMimeType('text/xml'); }
       if (!xmlHttpObject) { 
           alert('Your browser does not support AJAX!');
           //return false;
       }
   }catch (e){
       // Internet Explorer
       try{
           xmlHttpObject = new ActiveXObject('Msxml2.XMLHTTP');
       }catch (e){
           try{
               xmlHttpObject = new ActiveXObject('Microsoft.XMLHTTP');
           }catch (e){
               alert('Your browser does not support AJAX!');
               //return false;
           }
       }
   }
   // To remove the error uncaught exception: Permission denied to call method XMLHttpRequest.open
   try {
       netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead');
   } catch (e) {
       //alert('Permission UniversalBrowserRead denied.');
   }        

   function dg_doAjaxRequest(query_string, uniquePrefix, HTTP_URL, is_debug, run_scrolling, scrolling_height){
       var query_string_ = (query_string != null) ? query_string : '';
       var is_debug     = (is_debug != null) ? is_debug : false;
       var request_url  = HTTP_URL+query_string_.replace("undefined", "");
       var run_scrolling  = (run_scrolling != null) ? run_scrolling : false;
       var scrolling_height = (scrolling_height != null) ? scrolling_height : "300px";
       
       xmlHttpObject.open('GET', request_url);
       xmlHttpObject.onreadystatechange=function() {
           if(xmlHttpObject.readyState == 4) {                    
             
               var responseText = xmlHttpObject.responseText;
               
               var start_tag = "<div id='"+uniquePrefix+"dg_ajax_container'>";
               var end_tag = "<div id='"+uniquePrefix+"dg_ajax_container_end'>";
               var start_tag_length = start_tag.length;
               var end_tag_length = '</div>'.length;
               var start_index = responseText.indexOf(start_tag);
               var end_index = responseText.indexOf(end_tag);
               var responseTextSelected = responseText.substring(start_index+start_tag_length,end_index-end_tag_length);                    
               
               document.getElementById(uniquePrefix+'dg_ajax_container_opacity').style.opacity = 1;
               document.getElementById(uniquePrefix+'dg_ajax_container_opacity').style.filter="progid:DXImageTransform.Microsoft.Alpha(opacity=100);";
               document.getElementById(uniquePrefix+'dg_ajax_container_opacity').style.filter="alpha(opacity=100);"; 
               document.getElementById(uniquePrefix+'ajax_loading_image').style.display = 'none';

               if(start_index == '-1' || end_index == '-1'){
                  if(responseText.length > 0){
                    // returns answer if error or click on regilar link was occured 
                    if(is_debug) alert('Wrong response from the server! Please try again later.');
                  }else{
                    // returns empty answer when double click occured
                    if(is_debug) alert('Empty response from the server! Please try again later.');
                  }
               }else{
                   document.getElementById(uniquePrefix+'dg_ajax_container').innerHTML = responseTextSelected;
                   if(run_scrolling != false){
                        var t = new ScrollableTable(document.getElementById(uniquePrefix+'_contentTable'), scrolling_height);
                   }
               }                       
           }
       }
       xmlHttpObject.send(null);

       document.getElementById(uniquePrefix+'dg_ajax_container_opacity').style.opacity = 0.77;
       document.getElementById(uniquePrefix+'dg_ajax_container_opacity').style.filter="progid:DXImageTransform.Microsoft.Alpha(opacity=77);";
       document.getElementById(uniquePrefix+'dg_ajax_container_opacity').style.filter="alpha(opacity=77);";
       document.getElementById(uniquePrefix+'ajax_loading_image').style.display = ''; 
       
       dg_disableLinksByElement(uniquePrefix+'dg_ajax_container_opacity');
   }
   
   function dg_disableLinksByElement(el) {
       if(false){
           obj = document.getElementById(el);
           y = obj.getElementsByTagName('*');

           for (var i = 0; i < y.length; i++){ // loop for buttons in child div.
               y[i].disabled = true;
           }
       
           if (document.getElementById && document.getElementsByTagName) {
               if (typeof(el) == 'string') {
                   el = document.getElementById(el);
               }
               var anchors = el.getElementsByTagName('a');
               for (var i=0, end=anchors.length; i<end; i++) {
                   anchors[i].href='javascript:void(0);';
               }
           }
       }
   }


//-->