function select_categ(id_categ){
document.productbrowser_form.id_categ.value=id_categ;
productbrowser('','');
}
var xmlHttp

function productbrowser(id_subcateg,action)
{ 
var id_categ=document.productbrowser_form.id_categ.value;
xmlHttp=GetXmlHttpObject()

if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
var url="productbrowser_aj.php"
url=url+"?id_categ="+id_categ
url=url+"&id_subcateg="+id_subcateg
url=url+"&action="+action
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("productbrowser").innerHTML=xmlHttp.responseText 
 } 
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}