代码如下
*{margin: 0;padding: 0;}
img{position:absolute;top:0;left:0;}
<scripttype="text/javascript">
(function(window){
// 获取对象
var img = document.getElementById("img");
// 为页面添加单击事件，鼠标点击时图片滑动到鼠标所在位置
document.onclick = function(event){
var event = event || window.event;
// 获取鼠标在页面上的坐标
var pageX = event.pageX || event.clientX + document.documentElement.scrollLeft;
var pageY = event.pageY || event.clientY + document.documentElement.scrollTop;
// 减去图片自身宽高的一半，使鼠标在图片中间
pageX = pageX - img.offsetWidth/2;
pageY = pageY - img.offsetWidth/2;
animate(img,{"left":pageX,"top":pageY});
};
// 封装缓动函数
function animate(obj,json,fn){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var flog = true ;
for( k in json ){
if( k === "zindex" ){
obj.style[k] = json[k];
}else if( k === "opacity" ){
var leader = getStyle(obj,k) * 100;
var target = json[k] * 100;
var step = ( target - leader ) / 10 ;
step = step > 0 ? Math.ceil( step ) : Math.floor( step );
leader = leader + step ;
obj.style[k] = leader / 100;
}else{
var leader = parseInt( getStyle(obj,k) );
var target = json[k];
var step = ( target - leader) / 10 ;
step = step > 0 ? Math.ceil( step ) : Math.floor( step );
leader = leader + step;
obj.style[k] = leader + "px";
};
if( leader !== target ){
flog = false;
}
}
if( flog ){
clearInterval(obj.timer);
if( fn ){
fn();
};
};
}, 15)
};
// 封装获取计算后样式的函数
function getStyle(obj,attr){
if( window.getComputedStyle ){
return window.getComputedStyle(obj,null)[attr];
}else{
return obj.currentStyle[attr];
};
};
})(window)
</script>