function getdata(php_script,target_div,page_nro) { // get data from source (what)
 var ajaxRequest;  // The variable that makes Ajax possible!
	
 try{
   // Opera 8.0+, Firefox, Safari
   ajaxRequest = new XMLHttpRequest();
 }catch (e){
   // Internet Explorer Browsers
   try{
      ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
   }catch (e) {
      try{
         ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
      }catch (e){
         // Something went wrong
         alert("Ajax could not initialize on your browser!");
         return false;
      }
   }
 }

  ajaxRequest.onreadystatechange  = function()
    {
         if(ajaxRequest.readyState  == 4)
         {
              if(ajaxRequest.status  == 200) {
                  document.getElementById(target_div).innerHTML = ajaxRequest.responseText; }
              else {
                 document.getElementById(target_div).innerHTML = ajaxRequest.status; }
         }
    } 

 document.getElementById(target_div).innerHTML ="<center><img src='gfx/loader.gif'></center>";
 var queryString="?origin=" + target_div + "&page_nro=" + page_nro;
 ajaxRequest.open("GET", php_script + queryString, true);
 ajaxRequest.send(null);

}