function getHTTPObjeto(){
         if (window.ActiveXObject) return new ActiveXObject("Microsoft.XMLHTTP");
         else if (window.XMLHttpRequest) return new XMLHttpRequest();
         else {
            alert("Su navegador no soporta AJAX.");
            return null;
         }
      }   
         
      
      
      function setViewCart(){
        if(httpObjeto.readyState == 4){
            var response = httpObjeto.responseText;
            var objDiv = document.getElementById("oObjCart");
            objDiv.innerHTML = response;
            objDiv.scrollTop = objDiv.scrollHeight;
         }
        
      }
     
    function doShowCart(){
            httpObjeto = getHTTPObjeto();
            if (httpObjeto != null) {
              link = "cartView.php";
              httpObjeto.open("GET", link , true);
              httpObjeto.onreadystatechange = setViewCart;
              httpObjeto.send(null);
            }
    } 
      
    function ShowcCart(accion){
         var ventana = document.getElementById('oClassWindow');
         ventana.style.display = accion; 
          if(accion == ''){
              doShowCart();
          }
      }  
      
      
      
    function setContador(){
         if(httpObjeto2.readyState == 4){
            var response = httpObjeto2.responseText;
            var objDiv = document.getElementById("openCartBtn");
            objDiv.innerHTML = response;
            objDiv.scrollTop = objDiv.scrollHeight;
         }
         doShowCart();
      }
         
      
      
  function doDelete(Elemento){ 
		
         httpObjeto2 = getHTTPObjeto();
         if (httpObjeto2 != null) {
            link ="delcart.php?del="+ Elemento ;
            httpObjeto2.open("GET", link , true);
            httpObjeto2.onreadystatechange = setContador;
            httpObjeto2.send(null);
         }
         
  }
  
  function openPay(){
    window.location="gotopay.php";
  }