var Core = {};

Core.getElementsByClass = function(theClass) {
    var elementArray = [];

    if (document.all)
    {
    elementArray = document.all;
    }
    else
    {
    elementArray = document.getElementsByTagName("*");
    }

    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.getElementsByClass(classObj);
    for (var i = 0; i < list.length; i++) {
    list[i].style.display = 'none';
    }
}

function showDiv(divObj) {
    document.getElementById(divObj).style.display='block';
}

function hideDiv(divObj) {
    document.getElementById(divObj).style.display='none';
}

function revertClass(classObj) {
    var list = Core.getElementsByClass(classObj);
    for (var i = 0; i < list.length; i++) {
    list[i].className = classObj;
    }
}

function tab(obj) {
	var tabs = document.getElementById('tabs').getElementsByTagName('li');
	var e = '';
	for (var i = 0; i < tabs.length; i++) {
    	tabs[i].className = '';
		if (tabs[i] == obj) {
			e = i+1;
		}
    }
	obj.className = 'active';
	var list = Core.getElementsByClass('tabContentIn');
    for (var i = 0; i < list.length; i++) {
    list[i].style.display = 'none';
    }
	document.getElementById('con'+e).style.display = 'block';
}

//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