carpetaPrincipal = ".com";

loadJS();

function loadJS()
{   
	urlLink = "&funcion=loadJavaScript";
    urlLink = getURL() + carpetaPrincipal+'/php/load.php?'+ urlLink; 
    Ajax (urlLink,getLoadJS);
}

function getLoadJS()
{
	x = request.responseText;
	script = document.createElement('script');
	script.type = 'text/javascript';
	script.text = x;	
	document.getElementsByTagName('head')[0].appendChild(script);
}

function getURL()
{
 	 urlMain = window.location.href;
 	 pos = urlMain.indexOf(carpetaPrincipal);    
  	 return urlMain.substr(0,pos); 
}

var request;     

function Ajax(url, funcion)
{
    if (window.XMLHttpRequest)    // Mozilla, IE7, Safari, etc
        request = new XMLHttpRequest();    
    
    if (window.ActiveXObject)     // IE5, IE6
        request = new ActiveXObject ("Microsoft.XMLHTTP");
    
    request.onreadystatechange = 
              function ()
              {
                  if(request.readyState == 4) // Conexion OK
                  {
                       if(request.status == 200)   // Hay respuesta del servidor      
                       {
                            funcion.call();
                       }
                   }
              };
    request.open("POST",url,true);          
    request.send(null);
    return this;
}