链式动画第一个为什么连不起来啊

Question

//这个是js运动框架，后面是调用这个函数 function getStyle(obj,curr)              {                if(obj.currentStyle)                {                  return obj.currentStyle[curr]                }                else                {                  return getComputedStyle(obj,false)[curr];                }              }             function  sartMove(obj,attr,iTarget,fnEnd)             {              clearInterval(obj.timer)            var aDiv=document.getElementById('div1')            var aDi=document.getElementById('div2')              obj.timer=setInterval(function(){                var curr=0                if(attr=='opacity')                {                   curr=Math.round(parseFloat(getStyle(obj,attr))*100);                }                else                {                 curr=parseInt(getStyle(obj,attr))                }                                                      var speed=(iTarget-curr)/6;                    speed>0?Math.ceil(speed):Math.floor(speed);                    if(curr==iTarget)                    {                      clearInterval(obj.timer)                      if(fnEnd)fuEnd();                                         }                   else                   {                    if(attr=='opacity')                    {                      obj.style.opacity=(curr+speed)/100;                      obj.style.fifter='alpha(opacity:'+(curr+speed)+')'                    }                    else                    {                    obj.style[attr]=curr+speed+'px'                   }                 }              },30)              } //这个是真正的代码，第一个width可以执行，但是第二个alert就执行不了了，求高人帮忙看看         

Answer 1

 if(fnEnd)fuEnd();

这里 fnEnd()写错了..

Answer 2

改了那个错的函数 还是不行啊