$(function(){
$(".prt-style").css({cursor:"pointer"}).children(".prt-t").click(function (){$(this).ExtMenu();});
});

$.fn.ExtMenu = function(animateoff){
	if($(this).siblings(".prt-m").css('display')=="none"){
	    if(!animateoff){
		    $(this).siblings(".prt-m").slideDown("normal");
		} else {
		    $(this).siblings(".prt-m").css({display:"block"});
		}
		$(this).attr("title","点击关闭").find(".prt-t-r img").attr("src","/cn/images/sanjiao1.gif");
	}else{
	    if(!animateoff){
		    $(this).siblings(".prt-m").slideUp("normal");
		} else {
		    $(this).siblings(".prt-m").css({display:"none"});
		}
		$(this).attr("title","点击展开").find(".prt-t-r img").attr("src","/cn/images/sanjiao2.gif");
	}
	return($(this));
}