//----------------------------------------------------------------
// addLoadEvent to window.onload
// calling syntax: addLoadEvent(nameOfSomeFunctionToRunOnPageLoad);
//----------------------------------------------------------------

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

//----------------------------------------------------------------
// Unhide all DIVS for a class
//----------------------------------------------------------------

function changeClassVisibility(parentID, className, visibility) {
    
  var parent = document.getElementById(parentID);

  var objects = document.getElementsByTagName('DIV');

  for(var x=0;x<objects.length;x++){
    if(objects[x].className==className){
      objects[x].style.visibility = visibility;
    }
  }    
}