function ver_enviar() {
id=document.getElementById("form_enviar");
if (id.style.display=='block') {
id.style.display='none';
}
else {
id.style.display='block';
}
return false;
}

function validar() {
var b = document.getElementById("busqueda").value;
if (b == "") {
alert("Ingrese una palabra");
return false;
}
}

startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("secciones");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}
window.onload=startList;