function mostrar(elem) {
  
  var x = document.getElementsByTagName("div");
  var k = 1;
  var i = 0;
  var elem_id_array = elem.id.split('_');
  var str= elem_id_array[elem_id_array.length-1];
  //var str = elem.id.substring(elem.id.length-1);
  var textoid = "texto_desplegable_" + str; 
  
  for (i = 0; i < x.length; i++){
	
      if(x[i].id == "texto_desplegable_"+k){
	  if(x[i].id != textoid){
	  	document.getElementById("texto_desplegable_" + (k)).style.display = "none";
        	document.getElementById("li_texto_desplegable_" + (k)).style.listStyleImage = 'url(http://itemsweb.esade.edu/web2010/imagenes/flecha_abajo.png)';
	  }
	  k++;		
	}
  }
  
  if (document.getElementById(textoid).style.display == "none"){
  	document.getElementById(textoid).style.display = "block";
  	document.getElementById("li_" + textoid).style.listStyleImage = 'url(http://itemsweb.esade.edu/web2010/imagenes/flecha_derecha.png)';
  } else {
    
    document.getElementById(textoid).style.display = "none";
    document.getElementById("li_" + textoid).style.listStyleImage = 'url(http://itemsweb.esade.edu/web2010/imagenes/flecha_abajo.png)';
  }
  ampliaMenu();
/*
  if (document.getElementById(textoid).style.display == "none"){
    for (i = 0; i < x.length; i++){
      if(x[i].id == "texto_desplegable" ){
        document.getElementById("texto_desplegable_" + (k)).style.display = "none";
        document.getElementById("li_texto_desplegable_" + (k)).style.listStyleImage = 'url(http://itemsweb.esade.edu/web2010/imagenes/flecha_abajo.png)';
        k++;      
      }
    }
    
    document.getElementById(textoid).style.display = "block";
    document.getElementById("li_" + textoid).style.listStyleImage = 'url(http://itemsweb.esade.edu/web2010/imagenes/flecha_derecha.png)';
  } else {
    alert('dani');
    document.getElementById(textoid).style.display = "none";
    document.getElementById("li_" + textoid).style.listStyleImage = 'url(http://itemsweb.esade.edu/web2010/imagenes/flecha_abajo.png)';
  }*/
}

function carrega() {

  var i,k, cont;
	var str;
	cont = 0; 
    i = 0;
    j = 1;
    x = document.getElementsByTagName("div");
    cont = x.length;
    i = 0;
    while (i < x.length){
      act = x[i];
      if (act.id == "fondo_txtdespl_centro") {
	  
        act.setAttribute('id','texto_desplegable_'+(j));
        act.style.display = "none";
        j++;
      }
      i++;
    }
    x = document.getElementsByTagName("a");
    //x=$("a");    
    i = 0;
    k = 1;
    while (i < x.length) {
      act = x[i];
      if (act.className.split(" ", 1) == "texto_desplegable_a") {
        act.setAttribute("id", "texto_desplegable_a_" + k);
        var elem = document.getElementById("texto_desplegable_a_" + k);
        elem.onclick = function(){mostrar(this);};
        k = k + 1;
      }
      i++
    }


    x = document.getElementsByTagName("li");
    i = 0;
    k = 1;
    while (i < x.length){
      act = x[i];
      if (act.className == "texto_desplegable_li") {
        act.id ="li_texto_desplegable_" + (k);
        k++;
      }
      i++;
    }
ampliaMenu();

}