function rolling(el, objWidth, speed, min){
	var $jq = jQuery.noConflict();
	if($jq("li",el).size() <= min){return false}
	var prevBtn = $jq("img",$jq("div.btn_prev",el));
	var nextBtn = $jq("img",$jq("div.btn_next",el));
	var prevX = 0;
	var nextX = -objWidth;
	$jq(prevBtn).click(function(){
		var obj = $jq("li:first",el);
		var objLast = $jq("li:last",el);
		$jq(objLast).insertBefore(obj);
		$jq(objLast).css("margin-left",-objWidth);
		$jq(objLast).animate(
			{marginLeft:prevX},
			{duration:speed ,complete:function(){
			}}
		);
	});
	$jq(nextBtn).click(function(){
		var obj = $jq("li:first",el);
		var objLast = $jq("li:last",el);
		$jq(obj).animate(
			{marginLeft:nextX},
			{duration:speed ,complete:function(){
				$jq(obj).insertAfter(objLast);
				$jq(obj).css("margin-left","0");
			}}
		);
	});
}
function fadeOut(el, speed, min){
	var $jq = jQuery.noConflict();
	if($jq("li",el).size() <= min){return false}
	var prevBtn = $jq("img",$jq("div.btn_prev",el));
	var nextBtn = $jq("img",$jq("div.btn_next",el));
	$jq("li:first",el).addClass("first");
	$jq("li:last",el).addClass("last");
	var objCurr = $jq("li:first",el);
	var flag;
	$jq(prevBtn).click(function(){
		flag = "prev";
		if(objCurr.hasClass("first")){
			objPrev = $jq("li:last",el);
		}else{
			objPrev = objCurr.prev();
		}
		objPrev.fadeIn(speed,function(){
			objCurr = objPrev;
			flag = "next";
		});
		objCurr.fadeOut(speed,function(){
		});
	});
	$jq(nextBtn).click(function(){
		if(flag != "prev"){
			if(objCurr.hasClass("last")){
				objNext = $jq("li:first",el);
			}else{
				objNext = objCurr.next();
			}
			objNext.fadeIn(speed,function(){
				objCurr = objNext;
			});
			objCurr.fadeOut(speed,function(){
			});
		}
	});
}