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);
}
//
window.getsize = function () {
	var w = 0, h = 0;
	if (typeof (this.innerWidth) == 'number') {
		//Non-IE
		w = this.innerWidth;
		h = this.innerHeight;
	} else if (document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
		//IE 6+ in 'standards compliant mode'
		w = document.documentElement.clientWidth;
		h = document.documentElement.clientHeight;
	} else if (document.body && (document.body.clientWidth || document.body.clientHeight)) {
		//IE 4 compatible
		w = document.body.clientWidth;
		h = document.body.clientHeight;
	}
	return({w:w,h:h});
}
//
fixMinHeight=function(){
	if((window.getsize()).h<800){
		(getElement('container')).style.height="800px";
	}
}