addLoadListener(fnEqualHeight);

function fnGetElementsByClassName(oElm, strTagName, strClassName) {
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/\-/g, "\\-");
	var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}

function fnEqualHeight() {
    var contentContainer = fnGetElementsByClassName(document, "*", "contentcontainer");
    var menuContainer = fnGetElementsByClassName(document, "*", "menucontainer");
    var homepageContainer = fnGetElementsByClassName(document, "*", "homepage");
    var spacerContainer = fnGetElementsByClassName(document, "*", "topspacer");

    var contentContainerHeight = contentContainer[0].offsetHeight;
    var menuContainerHeight = menuContainer[0].offsetHeight;

    if (navigator.userAgent.indexOf("MSIE") == -1) {
        contentContainerHeight = contentContainerHeight - 30;
    }

    if (contentContainerHeight > menuContainerHeight) {
        menuContainer[0].style.height = contentContainerHeight + "px";
    }
    else {
        contentContainer[0].style.height = menuContainerHeight + "px";
    }

    if (homepageContainer[0] != null) {
        var spacerheight = (contentContainer[0].offsetHeight - homepageContainer[0].offsetHeight + 30) / 2;
        spacerContainer[0].style.height = spacerheight + "px";
    }
}

function addLoadListener(fn) {
    if (typeof window.addEventListener != 'undefined') {
        window.addEventListener('load', fn, false);
    }
    else if (typeof document.addEventListener != 'undefined') {
        document.addEventListener('load', fn, false);
    }
    else if (typeof window.attachEvent != 'undefined') {
        window.attachEvent('onload', fn);
    }
    else {
        var oldfn = window.onload;
        if (typeof window.onload != 'function') {
            window.onload = fn;
        }
        else {
            window.onload = function() {
                oldfn();
                fn();
            };
        }
    }
}