function ajaxManager()
	{
	var args = ajaxManager.arguments;
	switch (args[0])
		{
		case "load_page":
		if (document.getElementById) {
			var x = (window.ActiveXObject) ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
			}
			if (x)
				{
			x.onreadystatechange = function()
					{
				if (x.readyState == 4 && x.status == 200)
						{
						el = document.getElementById(args[2]);
						el.innerHTML = x.responseText;
					}
					}
				x.open("GET", args[1], true);
				x.send(null);
				}
			break;
		
		case "hide_menu":
        document.getElementById("inicio").style.visibility = "visible";
		document.getElementById("slideshow").style.visibility = "hidden";
		document.getElementById("declara").style.visibility = "hidden";
		document.getElementById("classif").style.visibility = "hidden";
  			break;


        case "hide_menu1":
		document.getElementById("inicio").style.visibility = "hidden";
		document.getElementById("slideshow").style.visibility = "visible";
		document.getElementById("declara").style.visibility = "hidden";
		document.getElementById("classif").style.visibility = "hidden";
  			break;


	    case "hide_menu2":
		document.getElementById("inicio").style.visibility = "hidden";
		document.getElementById("slideshow").style.visibility = "hidden";
		document.getElementById("declara").style.visibility = "visible";
		document.getElementById("classif").style.visibility = "hidden";
  			break;

        case "hide_menu3":
		document.getElementById("inicio").style.visibility = "hidden";
		document.getElementById("slideshow").style.visibility = "hidden";
		document.getElementById("declara").style.visibility = "hidden";
		document.getElementById("classif").style.visibility = "visible";
  			break;

		}
	}