关于IE10以下的img标签问题解决

<div class="all" id="box">
    <img id="image" src="psb.png" width="512" height="1470" >
    <span id="up"></span>
    <span id="down"></span>
</div>

.all{ 
    position: relative;
    width: 512px; 
    height: 400px; 
    border: 1px solid #000; 
    margin:100px auto; 
    overflow: hidden;
}
span{
    width: 512px; 
    height: 200px; 
    position: absolute; 
    left: 0; 
    top: 0; 
    cursor: pointer;
}
#down{ 
    top: auto; 
    bottom: 0; 
}

var ops = document.getElementById('image'),
    oup = document.getElementById('up'),
    odown = document.getElementById('down'),
    obox = document.getElementById('box'),
    timer = null;
    num = 0;

oup.onmouseover = function(){             
    clearInterval(timer);
    timer = setInterval(function(){
        num -= 4;
        if(num < -1070){
            num = -1070;
            clearInterval(timer);
        }
        ops.style.marginTop = num+'px';
    },30)
}

odown.onmouseover = function(){   
    clearInterval(timer);
    timer = setInterval(function(){
        num += 4;
        if(num > 0){
            num = 0;
            clearInterval(timer);
        }
        ops.style.marginTop = num+'px';
    },30)
}

obox.onmouseout = function(){ 
    clearInterval(timer);
}

 background: #fff;
 opacity: 0;
 filter:alpha(opacity=0);

<img id="image" src="psb.png" width="512" height="1470" >
<div class="all" id="box">       
    <span id="up"></span>
    <span id="down"></span>
</div>