var Core = {};

// function is changed for getting faster performance especaialy in ie
Core.getElementsByClass1 = function(theClass, tag)
{
  var elementArray = [];
  	if (document.getElementsByTagName(tag)) {
    	elementArray = document.getElementsByTagName(tag);
	}
	else {
		elementArray = document.all;
	}


  var matchedArray = [];
  var pattern = new RegExp("(^| )" + theClass + "( |$)");

  for (var i = 0; i < elementArray.length; i++)
  {
    if (pattern.test(elementArray[i].className))
    {
      matchedArray[matchedArray.length] = elementArray[i];
    }
  }

  return matchedArray;
};

function hideClass(classObj) {
	var list = Core.getElementsByClass1(classObj, 'div');
	for (var i = 0; i < list.length; i++) {
	list[i].style.display = 'none';
	}  
}

function roll_over(img_name, img_src)
   {
   document.getElementById(img_name).src = '/images/' + img_src;
   }



//start menu script
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);
//end menu script