function swapText(elem)
{
    var im = document.getElementById("swap0");	
    var capa = document.getElementById("swapDiv0");	
    if ( elem == 0 ){
        im.src = "images/menu_welcome_selected.gif";
        capa.style.display = 'block' ;
    } else {
        im.src = "images/menu_welcome_out.gif";
        capa.style.display = 'none' ;
    }

    im = document.getElementById("swap1");	
    capa = document.getElementById("swapDiv1");				
    if ( elem == 1 ){
        im.src = "images/menu_about_selected.gif";
        capa.style.display = 'block' ;
    }else{
        im.src = "images/menu_about_out.gif";
        capa.style.display = 'none' ;
    }

    im = document.getElementById("swap2");	
    capa = document.getElementById("swapDiv2");				
    if ( elem == 2 ) {
        im.src = "images/menu_contact_selected.gif";
        capa.style.display = 'block' ;
    } else {
        im.src = "images/menu_contact_out.gif";
        capa.style.display = 'none' ;
    }
}