报错:Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'
li1.onmouseover=function(){
startMove(li1,"height",300,function(){
startMove(this,"width",600);
});
};如果第二层函数里面写this而不懈li1就回报这个错,这是为什么呢?