樣式：.red{ border:1px solid #d00; background:#ffe9e8; color:#d00;}

function shake(ele,cls,times){                   var i = 0,t= false ,o =ele.attr("class")+" ",c ="",times=times||2;        if(t) return;        t= setInterval(function(){            i++;            c = i%2 ? o+cls : o;            ele.attr("class",c);            if(i==2*times){            	clearInterval(t);            	ele.removeClass(cls);            }        },200);     };