function  setchangeLast() {
	var selectovercat = document.getElementById('overcat');  
  var overcat = selectovercat.options[selectovercat.selectedIndex].value;
	var selectcat = document.getElementById('cat');  
  var cat = selectcat.options[selectcat.selectedIndex].value; 
  var url= '../inside/changelast.php?filterovercat='+overcat+'&filtercat='+cat;
  var thischange = document.getElementById("thischange");      
  prepareRequest(url,thischange);
} 

function prepareRequest(url,semka){  
     
        if (window.ActiveXObject)
        {
          httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else
        {
          httpRequest = new XMLHttpRequest();
        }
        httpRequest.open("GET", url, true);
        httpRequest.onreadystatechange= function () {processRequest(semka); } ;
        httpRequest.send(null);
}        	
	
function processRequest(semka)
{
 
  if (httpRequest.readyState == 4)
  {
    if(httpRequest.status == 200)
    {   
      semka.innerHTML = httpRequest.responseText;
    }
    else
    {
        alert("Chyba pri nacitani stanky"+ httpRequest.status +":"+ httpRequest.statusText);
    }
  }
}