function getTop(e){  
	var offset=e.offsetTop;  
	if(e.offsetParent!=null) offset+=getTop(e.offsetParent);  
	return offset;  
}  
function getLeft(e){  
	var offset=e.offsetLeft;  
	if(e.offsetParent!=null) offset+=getLeft(e.offsetParent);  
	return offset;  
}
function toggleDesc(event,width,desc){
	if(arguments.length==0){jQuery("#desc_tip").hide();return;}
	event=event?event:window.event;
	var sObj=event.srcElement||event.target;
	var top=getTop(sObj);
	var left=getLeft(sObj);
	if(left>720){
		left=left-width+sObj.offsetWidth-0;
	}
	jQuery("#desc_tip").html("<i></i>"+"<div>"+"<span>"+desc+"</span>"+"</div>").css({top:top+66+"px",left:left+1+"px",width:width+"px"}).show()
}


jQuery(document).ready(function(){
		jQuery(window).scroll(function(){
			var bottom=jQuery(document).height()-jQuery(window).scrollTop()-window.screen.availHeight;
			if(bottom<0){
				jQuery("#more_tag").animate({height:'hide',opacity: 'hide'},'slow')
			}else{
				jQuery("#more_tag").animate({opacity: 'show'},'fast');
			}
			if(jQuery.browser.msie && jQuery.browser.version=="6.0"){
				var top=jQuery(window).scrollTop()+window.screen.availHeight-jQuery("#more_tag").height()-480;
				var right=jQuery(window).scrollLeft()+window.screen.availWidth-jQuery("#more_tag").width()-25;
				jQuery("#more_tag").css("position","absolute").css("left",right+"px").css("top",top+"px");
			}

            });

        
		
	});