var active = null;
//
var agent = navigator.userAgent.toLowerCase(); 
var isMac = (agent.indexOf("mac") != -1) ? true : false;
var isMSIE = (navigator.appVersion.indexOf("MSIE")!=-1) ? true : false;
//
toCamelCase=function (s) {
	for (var exp = /-([a-z])/; exp.test(s); s=s.replace(exp, RegExp.$1.toUpperCase())) {
	}
	return s;
}
//
getStyle=function (el, style) {
	if (!document.getElementById) {
		return;
	}
	var value = el.style[toCamelCase(style)];
	if (!value) {
		if (document.defaultView) {
			value = document.defaultView.getComputedStyle(el, "").getPropertyValue(style);
		} else if (el.currentStyle) {
			value = el.currentStyle[toCamelCase(style)];
		}
	}
	return value;
}
//
getElement=function(id){	
	if (!document.getElementById){
	 return;
	}
	//
	if (document.getElementById){
		// this is the way the standards work
		var el = document.getElementById(id);
	}else if (document.all){
		// this is the way old msie versions work
		var  el = document.all[id];
	}else if (document.layers){
		// this is the way nn4 works
		var el = document.layers[id];
	}
	return el;
}
//
toggleDisplay=function(el){
	el.style.display = el.style.display ? "" : "block";
}
//
switchContent=function(id){
	//turn off last active
	if(active){
		toggleDisplay(active);
	}
	active=getElement(id);
	toggleDisplay(active);
}
//

getQueryVariable = function (variable) {
	var query = window.location.search.substring(1);
	var vars = query.split("&");
	for (var i = 0; i<vars.length; i++) {
		var pair = vars[i].split("=");
		if (pair[0] == variable) {
			return pair[1];
		}
	}
};
//
replaceAnchors=function(){
	if (document.getElementById) {
		var atags = document.getElementsByTagName("A");
		for (var i = 0; i<atags.length; i++) {
			var ca = atags[i];
			var index=ca.href.indexOf("#");
			var hash=ca.href.substring(index+1);
			if (index>-1 &&	hash.length>0) {
				ca.link=hash;
				ca.onclick = function() {	
					var b = getElement('content');
					b.scrollTop = getElement(this.link).offsetTop;
					return false;
				};
			}
		}
	}
}