function cargarIframe(id_iframe, url){
    var id_iframe =  document.getElementById(id_iframe);
    
    for(i=0;i<=n;i++){
        if (iframes[i] == id_iframe){
        return;    
        }
    }       
    n = n +1;
    iframes[n] = id_iframe;
    id_iframe.src = url;     

   }
   
   function cargarBackground(funcion){
    
    for(i=0;i<=n;i++){
        if (backgroundArray[i] == funcion){
        return;    
        }
    }       
    x = x +1;
    backgroundArray[x] = funcion;  
    funcion();
   }
   
   
   function backgroundForo()
{
document.getElementById('foroBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c8.gif)";
}

function backgroundLinks()
{
document.getElementById('linksBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c7.gif)";
}

function backgroundArchivos()
{
document.getElementById('archivosBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c6.gif)";
}

function backgroundFaqs()
{
document.getElementById('preguntasBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c5.gif)";
}

function backgroundPrensa()
{
document.getElementById('prensaBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c4.gif)";
}

function backgroundEstudios()
{
document.getElementById('estudioBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c3.gif)";
}

function backgroundInformacion()
{
document.getElementById('informacionBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c2.gif)";
}


function backgroundPrincipal()
{
document.getElementById('principalBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c122.gif)";
}

function backgroundContactenos()
{
document.getElementById('contactenosBackground').style["backgroundImage"] = "url(images/fondoGIF2/FondosGIF2Cortadas2/trem_horizontal_r1_c9.gif)";
}