基础运动move.js

/*
* 事件绑定
*/
function myAddEvent(obj,ev,fn){
if(obj.attachEvent){
obj.attachEvent('on' + ev,fn);
}else{
obj.addEventListener(ev,fn,false);
}
}
/*
* 获取样式值
*/
function getStyle(obj, name) {
if(obj.currentStyle) {
return obj.currentStyle[name];
} else {
return getComputedStyle(obj, false)[name];
}
}

/*
* 缓冲运动特效函数
*/
function startMove(obj, attr, iTarget) {
clearInterval(obj.timer);
obj.timer = setInterval(function() {
var cur = 0;
if(attr == 'opacity') {
cur = Math.round(parseFloat(getStyle(obj, attr)) * 100);
} else {
cur = parseInt(getStyle(obj, attr));
}
var speed = (iTarget - cur) / 6;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if(cur == iTarget) {
clearInterval(obj.timer);
} else {
if(attr == 'opacity') {
obj.style.filter = 'Alpha(opacity:' + (cur + speed) + ')';
obj.style.opacity = (cur + speed) / 100;

document.getElementById('txt1').value = obj.style.opacity;
} else {
obj.style[attr] = cur + speed + 'px';
}
}
}, 30);
}
/*
* 完美缓冲运动特效函数
*/
function startMove1(obj, json, fnEnd) {
clearInterval(obj.timer);
obj.timer = setInterval(function() {
var bStop = true; //假设所有的值都已经到了
for(var attr in json){
var cur = 0;
if(attr == 'opacity') {
cur = Math.round(parseFloat(getStyle(obj, attr)) * 100);
} else {
cur = parseInt(getStyle(obj, attr));
}
var speed = (json[attr] - cur) / 6;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);

if(cur != json[attr]){
bStop = false;
}

if(attr == 'opacity') {
obj.style.filter = 'Alpha(opacity:' + (cur + speed) + ')';
obj.style.opacity = (cur + speed) / 100;

document.getElementById('txt1').value = obj.style.opacity;
} else {
obj.style[attr] = cur + speed + 'px';
}
}

if(bStop){
clearInterval(obj.timer);
if(fnEnd){
fnEnd();
}
}
}, 30);
}