move.js

function getStyle(obj,attr){

if(obj.currentStyle){

return obj.currentStyle[attr];//currentStyle针对IE浏览器

}else{

return getComputedStyle(obj,false)[attr];//getComputedStyle针对火狐浏览器

}

}

function startMove(obj,json,fn){

var flag = true;

clearInterval(obj.timer);

obj.timer=setInterval(function(){

for(var attr in json)

{

var icur=0;

if(attr=='opacity'){

icur=Math.round(parseFloat(getStyle(obj,attr))*100);

}else{

icur=parseInt(getStyle(obj,attr));

}

var speed = (json[attr]-icur)/8;

speed = speed>0?Math.ceil(speed):Math.floor(speed);

if(icur != json[attr]){

flag=false;

}

if(attr=='opacity'){

obj.style.filter='alpha(opacity:'+(icur+speed)+')';

obj.style.opacity=(icur+speed)/100;

}else{obj.style[attr] = icur+speed+'px';}

}

if(flag){

clearInterval(obj.timer);

if(fn){

fn();

}

}

},30)

}