move.js

//一次改進版//function move(obj, attr, end, start, stepNum) {////	var speed = (end - start) / stepNum;//	this.time = setInterval(function() {//		start += speed;//		if (start >= end && speed > 0) {//			clearInterval(this.time);//			start = end;//		}//		if (start <= end && speed < 0) {//			clearInterval(this.time);//			start = end;//		}//		obj.style[attr] = start + "px";//	}, 10)//}function getStyle(obj,attr){	if(obj.currentStyle){		return obj.currentStyle[attr]	}else{		return getComputedStyle(obj)[attr];	}}//二次改進版function move(obj, attr, end,stepNum,fn) {	var start = parseInt(getStyle(obj,attr));	var speed = (end - start) / stepNum;	clearInterval(obj.time);	obj.time = setInterval(function() {		start += speed;		if (start >= end && speed > 0) {			clearInterval(obj.time);			start = end;			if(fn){				fn();			}					}		if (start <= end && speed < 0) {			clearInterval(obj.time);			start = end;			if(fn)			{				fn();			}					}		obj.style[attr] = start + "px";	}, 10)}

　　

利用jq实现