(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('#footer').positionFixed()
})