<!--
    if (document.images)
    {
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "images/chisiamo_over.jpg";
      image_url[1] = "images/collezioni_over.jpg";
      image_url[2] = "images/materiali_over.jpg";
      image_url[3] = "images/lavorazioni_over.jpg";
	  image_url[4] = "images/shopping_over.jpg";

       var i = 0;
       for(i=0; i<=3; i++) 
         preload_image_object.src = image_url[i];
    }

//-->
menu_select = '';
function swapImage(idname){
	if(menu_select == ''){
		newImage = "url(images/" + idname + "_over.jpg)";
	
		if (document.getElementById){
			document.getElementById("table_" + idname).style.backgroundImage = newImage;
		}
		else if (document.all){
			document.all("table_" + idname).style.backgroundImage = newImage;
		}
		else if (document.layers){
			document.layers("table_" + idname).style.backgroundImage = newImage;
		}
		menu_select = idname;
	}
	else{
		newImage = "url(images/spacer.gif)";
	
		if (document.getElementById){
			document.getElementById("table_" + idname).style.backgroundImage = newImage;
		}
		else if (document.all){
			document.all("table_" + idname).style.backgroundImage = newImage;
		}
		else if (document.layers){
			document.layers("table_" + idname).style.backgroundImage = newImage;
		}
		menu_select = '';
	}
}