var pagina_oud="home";

function showContent(pagina) {
	var oRequest;
	try {
	        oRequest=new XMLHttpRequest();
	     } catch (e)   {
	     try {
	          oRequest=new ActiveXObject("Msxml2.XMLHTTP");
	          } catch (e) {
	          try {
	              oRequest=new ActiveXObject("Microsoft.XMLHTTP");
	               } catch (e) {
	                   alert("Your browser does not support AJAX!");
	                  return false;
	               }
	         }
	      }
	   oRequest.onreadystatechange=function() {
	    if(oRequest.readyState==4)
	      {

		  	  document.getElementById(pagina_oud).innerHTML = "<div class='nav_item'><a href='javascript:showContent(\""+pagina_oud+"\")'>"+pagina_oud+"</a></div>";
			  pagina_oud=pagina;
			  document.getElementById(pagina).innerHTML = "<div class='nav_item_a'><a href='javascript:showContent(\""+pagina+"\")'>"+pagina+"</a></div>";
			  
	          document.getElementById("container1").innerHTML = oRequest.responseText;
	      }
	    }
	  oRequest.open("GET","script/"+pagina+".php",true);
	  oRequest.send(null);
	  
	  
}


function showMessage(pagina) {
	var oRequest;
	try {
	        oRequest=new XMLHttpRequest();
	     } catch (e)   {
	     try {
	          oRequest=new ActiveXObject("Msxml2.XMLHTTP");
	          } catch (e) {
	          try {
	              oRequest=new ActiveXObject("Microsoft.XMLHTTP");
	               } catch (e) {
	                   alert("Your browser does not support AJAX!");
	                  return false;
	               }
	         }
	      }
	   oRequest.onreadystatechange=function() {
	    if(oRequest.readyState==4)
	      {
	          document.getElementById("container1").innerHTML = oRequest.responseText;
	      }
	    }
	  oRequest.open("GET","script/"+pagina+".php",true);
	  oRequest.send(null);
	  
	  
}