function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
} else{
return getComputedStyle(obj,false)[attr];
}
};
function startMove(obj,json,fn){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var bStop=true; //这一次运动就结束了,所有值都到达了。
for(var attr in json){
//1.取当前的值
var iCur=0;
if(attr == ‘opacity‘){
iCur=parseInt(parseFloat(getStyle(obj,attr))*100);
} else{
iCur=parseInt(getStyle(obj,attr));
}
//2.算速度
var iSpeed=(json[attr]-iCur)/8;
iSpeed=iSpeed>0?Math.ceil(iSpeed):Math.floor(iSpeed);
//3.检测停止
if(iCur!=json[attr]){
bStop=false;
}
if(attr==‘opacity‘){
obj.style.filter=‘alpha(opacity:‘+(iCur+iSpeed)+‘)‘;
obj.style.opacity=(iCur+iSpeed)/100;
} else{
obj.style[attr]=iCur+iSpeed+‘px‘;
}
}
if(bStop){
clearInterval(obj.timer);
if(fn){
fn();
}
}
},30)
}
/*
调用
window.onload=function(){
var oDiv=document.getElementByIdx_x(‘div1‘);
oDiv.onmouseover=function(){
startMove(oDiv, {width: 102, height: 200, opacity: 100});
}
oDiv.onmouseout=function(){
startMove(oDiv, {width: 100, height: 100, opacity: 30});
}
};
*/