(function($j){
	$j.positionFixed = function(el){
		$j(el).each(function(){
			new fixed(this)
		})
		return el;
	}
	$j.fn.positionFixed = function(){
		return $j.positionFixed(this)
	}
	var fixed = $j.positionFixed.impl = function(el){
		var o=this;
		o.sts={
			target : $j(el).css('position','fixed'),
			container : $j(window)
		}
		o.sts.currentCss = {
			top : o.sts.target.css('top'),
			right : o.sts.target.css('right'),
			bottom : o.sts.target.css('bottom'),
			left : o.sts.target.css('left')
		}
		if(!o.ie6)return;
		o.bindEvent();
	}
	$j.extend(fixed.prototype,{
		ie6 : $.browser.msie && $.browser.version < 7.0,
		bindEvent : function(){
			var o=this;
			o.sts.target.css('position','absolute')
			o.overRelative().initBasePos();
			o.sts.target.css(o.sts.basePos)
			o.sts.container.scroll(o.scrollEvent()).resize(o.resizeEvent());
			o.setPos();
		},
		overRelative : function(){
			var o=this;
			var relative = o.sts.target.parents().filter(function(){
				if($j(this).css('position')=='relative')return this;
			})
			if(relative.size()>0)relative.after(o.sts.target)
			return o;
		},
		initBasePos : function(){
			var o=this;
			o.sts.basePos = {
				top: o.sts.target.offset().top - (o.sts.currentCss.top=='auto'?o.sts.container.scrollTop():0),
				left: o.sts.target.offset().left - (o.sts.currentCss.left=='auto'?o.sts.container.scrollLeft():0)
			}
			return o;
		},
		setPos : function(){
			var o=this;
			o.sts.target.css({
				top: o.sts.container.scrollTop() + o.sts.basePos.top,
				left: o.sts.container.scrollLeft() + o.sts.basePos.left
			})
		},
		scrollEvent : function(){
			var o=this;
			return function(){
				o.setPos();
			}
		},
		resizeEvent : function(){
			var o=this;
			return function(){
				setTimeout(function(){
					o.sts.target.css(o.sts.currentCss)
					o.initBasePos();
					o.setPos()
				},1)
			}
		}
	})
})(jQuery)

jQuery(function($j){
	$j('.fixed').positionFixed()
})