function EnviaBusca(){

      if(document.getElementById('palavraChaveBuscaPagina').value != ""){
         document.forms[0].action = "pagina.aspx?56";
         document.forms[0].submit();
      }else{
         alert("Preenhca o campo com o conteúdo que deseja buscar");
         document.getElementById('palavraChaveBuscaPagina').focus();
         return false;
      }
   }


   function associaValidacao(){

      try{
         document.forms[0].attachEvent("onsubmit", EnviaBusca);
      }//try

      catch(ex){ 
         document.forms[0].setAttribute("onsubmit", "return EnviaBusca();");
      }//catch

   }//function


   function dissociaValidacao(){

      try{
         document.forms[0].detachEvent("onsubmit", EnviaBusca);
      }//try

      catch(ex){ 
         document.forms[0].removeAttribute("onsubmit");
      }//catch

   }//function