/**
  * show/hide description text
  * @return void
  */
function ShowDescription(cServiceID)
{
    oDesc = $(cServiceID);
    
    oSlide = new Fx.Slide(cServiceID);
    if (oDesc.getStyle("display")=="none")
    {
        oSlide.hide();
        oDesc.setStyle("display", "block");
    }
    
    oSlide.toggle();
}

/**
 * dont allow check both checkboxes
 * @return void
 */
function naceCehck(oElement)
{
    $$(".nacecheck").each(function(oInput) 
    {
        if (oElement.name!=oInput.name && oElement.get("checked")==true)
            oInput.set("checked", false);
    });
}