function gup( name )  {
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}

function chargement() {
	var liste = document.getElementById('filtre_cat');
	for (var i=0; i<liste.options.length; i++) {
  		if (liste.options[i].selected ) {
  		    var mode = gup('mode');
  		    if (mode == '') {
  		    	mode = 'details';
  		    }
  		    var categorie = gup('c');
  		    if (categorie == '') {
  		    	categorie = category();
  		    }
  			cible = 'category.php?mode=' + mode + '&c=' + categorie + '&sc='+ liste.options[i].value;
  			window.location.replace(cible);
  			break;
  		}
  	}
}