function getObj(name)
{
  if (document.getElementById)
  {
  	this.obj = document.getElementById(name);
	this.style = document.getElementById(name).style;
  }
  else if (document.all)
  {
	this.obj = document.all[name];
	this.style = document.all[name].style;
  }
  else if (document.layers)
  {
   	this.obj = document.layers[name];
   	this.style = document.layers[name];
  }
}

//---------------------------------------------------------------

var error_array = [];

function show_error(layer)
{
  var err1 = new getObj('error');
  var err2 = new getObj(layer);	  

  err1.style.visibility = 'visible';
  err2.style.visibility = 'visible';  
}

function hideLayers()
{
 var lyr;
 for (var i = 0; i < error_array.length; i++) {
	  lyr = new getObj(error_array[i]);
      lyr.style.visibility = 'hidden';
 }
 error_array = []; 
}