百度有啊鼠标移上去图片位置动态改变效果
呵呵,仔细找找就把相关的代码找出来了,核心就是JumpObj类了,项目中有类似需求,直接拿过来用就行了,当然,版权归baidu,:)
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//百度原有的JumpObj,拿过来就用了
function JumpObj(elem, range, startFunc, endFunc) {
var curMax = range = range || 6;
startFunc = startFunc || function(){};
endFunc = endFunc || function(){};
var drct = 0;
var step = 1;
init();
function init() { elem.style.position = 'relative';active() }
function active() { elem.onmouseover = function(e) {if(!drct)jump()} }
function deactive() { elem.onmouseover = null }
function jump() {
var t = parseInt(elem.style.top);
if (!drct) motionStart();
else {
var nextTop = t - step * drct;
if (nextTop >= -curMax && nextTop <= 0) elem.style.top = nextTop + 'px';
else if(nextTop < -curMax) drct = -1;
else {
var nextMax = curMax / 2;
if (nextMax < 1) {motionOver();return;}
curMax = nextMax;
drct = 1;
}
}
setTimeout(function(){jump()}, 200 / (curMax+3) + drct * 3);
}
function motionStart() {
startFunc.apply(this);
elem.style.top='0';
drct = 1;
}
function motionOver() {
endFunc.apply(this);
curMax = range;
drct = 0;
elem.style.top = '0';
}
this.jump = jump;
this.active = active;
this.deactive = deactive;
}
function MyInit()
{
var range = 6;
//Baidu原有的写法,效果同Jquery的$(".img"),替换掉
//var elements = Dom.getElementsByClassName('img', "recommend-zone");
//Jquery的简洁写法
$(".img").each(function(){
new JumpObj(this, range);
});
//常规写法
// var elements = $(".img");
// for (var i = 0; i < elements.length; i++) {
// new JumpObj(elements[i], range);
// }
}
MyInit();
function JumpObj(elem, range, startFunc, endFunc) {
var curMax = range = range || 6;
startFunc = startFunc || function(){};
endFunc = endFunc || function(){};
var drct = 0;
var step = 1;
init();
function init() { elem.style.position = 'relative';active() }
function active() { elem.onmouseover = function(e) {if(!drct)jump()} }
function deactive() { elem.onmouseover = null }
function jump() {
var t = parseInt(elem.style.top);
if (!drct) motionStart();
else {
var nextTop = t - step * drct;
if (nextTop >= -curMax && nextTop <= 0) elem.style.top = nextTop + 'px';
else if(nextTop < -curMax) drct = -1;
else {
var nextMax = curMax / 2;
if (nextMax < 1) {motionOver();return;}
curMax = nextMax;
drct = 1;
}
}
setTimeout(function(){jump()}, 200 / (curMax+3) + drct * 3);
}
function motionStart() {
startFunc.apply(this);
elem.style.top='0';
drct = 1;
}
function motionOver() {
endFunc.apply(this);
curMax = range;
drct = 0;
elem.style.top = '0';
}
this.jump = jump;
this.active = active;
this.deactive = deactive;
}
function MyInit()
{
var range = 6;
//Baidu原有的写法,效果同Jquery的$(".img"),替换掉
//var elements = Dom.getElementsByClassName('img', "recommend-zone");
//Jquery的简洁写法
$(".img").each(function(){
new JumpObj(this, range);
});
//常规写法
// var elements = $(".img");
// for (var i = 0; i < elements.length; i++) {
// new JumpObj(elements[i], range);
// }
}
MyInit();