function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function mostrardivEmpresas() {


var div1 = document.getElementById("empresas");
var div2 = document.getElementById("empresasExtra");

div2.style.display = "";
div1.style.display = "none";

}

function cerrarDivEmpresas() {

var div1 = document.getElementById("empresas");
var div2 = document.getElementById("empresasExtra");

div2.style.display="none";
div1.style.display="";

}