个回答

• jokec

  2015-11-27 17:00:14

  function startMove(obj,json,fn){

  var frag=true;

  clearInterval(obj.timer);

  obj.timer=setInterval(function(){

  for(var att in json){

  var wid=0;

  //判断是否为设置透明度属性

  if (att=='opacity') {

  wid=Math.round(parseFloat(getStyle(obj,att))*100);

  }else{

  wid=parseInt(getStyle(obj,att));

  }  

  var speed=(json[att]-wid)/8;

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

  if (json[att]!=wid) {

  frag=false;

  }

  
  

  if (att=='opacity') {

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

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

  } else {

  obj.style[att]=wid+speed+'px';

  }

  }

  if (frag) {

  clearInterval(obj.timer);

  if (fn) {

  fn();

  }

  }

  },30);

  }

  //获取obj的属性方法，兼容浏览器

  function getStyle(obj,att){

  if (obj.currentStyle) {

  return obj.currentStyle[att];

  }else{

  return getComputedStyle(obj,false)[att];

  }

  }

  
  

  1