js运动裤（封装二），没有回调函数

miaov.js

使用方法：

var oDiv = document.getElementById("div1");
    oDiv.onmouseover=function(){
        miaovStartMove(this,{opacity:100,width:300},MIAOV_MOVE_TYPE.BUFFER);   //运动对象，运动属性，运动方式
        //this.style.opacity=0;
    }

miaov.js代码库：

function css(obj, attr, value)
{
    if(arguments.length==2)
    {
        if(attr!='opacity')
        {
            return parseInt(obj.currentStyle?obj.currentStyle[attr]:document.defaultView.getComputedStyle(obj, false)[attr]);
        }
        else
        {
            return Math.round(100*parseFloat(obj.currentStyle?obj.currentStyle[attr]:document.defaultView.getComputedStyle(obj, false)[attr]));
        }
    }
    else if(arguments.length==3)
        switch(attr)
        {
            case 'width':
            case 'height':
            case 'paddingLeft':
            case 'paddingTop':
            case 'paddingRight':
            case 'paddingBottom':
                value=Math.max(value,0);
            case 'left':
            case 'top':
            case 'marginLeft':
            case 'marginTop':
            case 'marginRight':
            case 'marginBottom':
                obj.style[attr]=value+'px';
                break;
            case 'opacity':
                obj.style.filter="alpha(opacity:"+value+")";
                obj.style.opacity=value/100;
                break;
            default:
                obj.style[attr]=value;
        }
    
    return function (attr_in, value_in){css(obj, attr_in, value_in)};
}

var MIAOV_MOVE_TYPE={
    BUFFER: 1,
    FLEX: 2
};

function miaovStopMove(obj)
{
    clearInterval(obj.timer);
}

function miaovStartMove(obj, oTarget, iType, fnCallBack, fnDuring)
{
    var fnMove=null;
    if(obj.timer)
    {
        clearInterval(obj.timer);
    }
    
    switch(iType)
    {
        case MIAOV_MOVE_TYPE.BUFFER:
            fnMove=miaovDoMoveBuffer;
            break;
        case MIAOV_MOVE_TYPE.FLEX:
            fnMove=miaovDoMoveFlex;
            break;
    }
    
    obj.timer=setInterval(function (){
        fnMove(obj, oTarget, fnCallBack, fnDuring);
    }, 30);
}

function miaovDoMoveBuffer(obj, oTarget, fnCallBack, fnDuring)
{
    var bStop=true;
    var attr='';
    var speed=0;
    var cur=0;
    
    for(attr in oTarget)
    {
        cur=css(obj, attr);
        if(oTarget[attr]!=cur)
        {
            bStop=false;
            
            speed=(oTarget[attr]-cur)/5;
            speed=speed>0?Math.ceil(speed):Math.floor(speed);
            
            css(obj, attr, cur+speed);
        }
    }
    
    if(fnDuring)fnDuring.call(obj);
    
    if(bStop)
    {
        clearInterval(obj.timer);
        obj.timer=null;
        
        if(fnCallBack)fnCallBack.call(obj);
    }
}

function miaovDoMoveFlex(obj, oTarget, fnCallBack, fnDuring)
{
    var bStop=true;
    var attr='';
    var speed=0;
    var cur=0;
    
    for(attr in oTarget)
    {
        if(!obj.oSpeed)obj.oSpeed={};
        if(!obj.oSpeed[attr])obj.oSpeed[attr]=0;
        cur=css(obj, attr);
        if(Math.abs(oTarget[attr]-cur)>=1 || Math.abs(obj.oSpeed[attr])>=1)
        {
            bStop=false;
            
            obj.oSpeed[attr]+=(oTarget[attr]-cur)/5;
            obj.oSpeed[attr]*=0.7;
            
            css(obj, attr, cur+obj.oSpeed[attr]);
        }
    }
    
    if(fnDuring)fnDuring.call(obj);
    
    if(bStop)
    {
        clearInterval(obj.timer);
        obj.timer=null;
        
        if(fnCallBack)fnCallBack.call(obj);
    }
}