function HelpText ()
{
   this.obj = null;
   this.theMap = null;
   this.text   = "Caricamento in corso.... attendere prego";
   this.init   = function (el, theMap)
   {
      this.obj = new top.LayerObject(el);
      this.obj.change(this.text);
      this.theMap = theMap;
   };
   
   this.roll   = function(str)
   {
      if (this.obj && ((this.theMap != null && !this.theMap.loading) || (this.theMap == null)))        this.obj.change(str);
   };
   
   this.unroll = function()
   {
      if (this.obj && ((this.theMap != null && !this.theMap.loading) || (this.theMap == null)))        this.obj.change(this.text);
   };
   
   this.set    = function (str)
   {
      if (this.obj)  this.obj.change(str);
      this.text = str;
   };
   
   this.get    = function ()
   {
      return this.text;
   };
}