// JavaScript Document
   function hideShow(elementId, show) {
    var element = document.getElementById(elementId);
    if (show == 'true')
        {
            element.style.visibility="visible";
        }
        else
        {
            element.style.visibility="hidden";
        }
    }
    function changeImage($id, $change_to)
    {
       document.getElementById($id).src=$change_to;
    }
     
    function hidden()
    {
      document.body.style.overflow='hidden';
    }
    
    function unhidden()
    {
      document.body.style.overflow='';
    }
    
    function caurspidigums($id)
    {
        document.getElementById($id).style.opacity=0;     
    }
    
    function change_text(elementID,text)
    {
      var element = document.getElementById(elementID);
      element.innerHTML=text;
    }