//////////////////////////////////////////////////////
// functions for LI:hover to work in IE //
sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

//////////////////////////////////////////////////////
// functions for Search box toggle
function IE4GetElementById(id) {
   return document.all[id];
}

function NN4GetLayerById(id) {
  // see xbStyle on the evangelism site
  // for details on a possible implementation
}

if (document.layers)
   document.getElementById = NN4GetLayerById;
else if (document.all && !document.getElementById)
   document.getElementById = IE4GetElementById;

function getStyleObject(id) {
   var elm = null;
   var styleObject = null;

   if (document.getElementById) {
   		elm = document.getElementById(id);
   };

   if (elm) {
      if (elm.style)
         styleObject = elm.style;
      else if (document.layers)
         styleObject = elm;
   }

  return styleObject;
}

function hide(id) {
  var styleObject = getStyleObject(id);

  if (styleObject)
    styleObject.visibility = 'hidden';
}
function show(id) {
  var styleObject = getStyleObject(id);

  if (styleObject)
    styleObject.visibility = 'visible';
}

function showHide(id) {
	var styleObject = getStyleObject(id);
	if (styleObject) {
    	if (styleObject.visibility == 'hidden') {
			styleObject.visibility = 'visible';
		} 
		else {
			styleObject.visibility = 'hidden';
		}
	}
}

//////////////////////////////////////////////////////
// functions to swap bg image of dropdown bar - only for index page
function bgOn() {
	var bgC = document.getElementById('bgContainer')
		if(bgC.className == 'bgOff')
			bgC.className = 'bgOn';
}
function bgOff() {
	var bgC = document.getElementById('bgContainer')
		if(bgC.className == 'bgOn')
			bgC.className = 'bgOff';
}