function carica(collegamento, dove)
{
    var xmlHttp;
    try
    {
        // Firefox, Opera 8.0+, Safari
        xmlHttp=new XMLHttpRequest();
    }
    catch (e)
    {
        // Internet Explorer
        try
        {
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            try
            {
                xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch (e)
            {
                alert("Your browser does not support AJAX!");
                return false;
            }
        }
    }
    xmlHttp.open("GET",collegamento,true);        
    xmlHttp.send();
        
    xmlHttp.onreadystatechange=function()
    {
         if(xmlHttp.readyState==4)
        {        
             document.getElementById(dove).innerHTML = xmlHttp.responseText;
        }
    }
    
}