VR全景图效果

<div id="div1" style="cursor:hand;position:absolute;width:500;height:190;overflow:hidden;" onmouseover="clearTimeout(scrl);" onmousemove="getpos()" onmouseout="change(1);"><img src="out500b.jpg" onload="change(1);" border=0></div>
<script language="javascript">
<!--
var scrl,direction="right";      
var x,xdiff,xold=0;

function change(start){
if(direction == "right"){               
    if(div1.scrollTop+190 < div1.scrollHeight){
        div1.scrollTop += 190;
    }
    else{
        div1.scrollTop = 0;         
    }
}
else{                             
    if(div1.scrollTop-190 > 0){
        div1.scrollTop -= 190;       
    }
    else{
        div1.scrollTop = div1.scrollHeight;  
    }
}
if(start)
 scrl = setTimeout("change(1)",100);     
else
 clearTimeout(scrl);                  
}

function getpos(){
x = event.clientX;
xdiff = x - xold;
xold = x;
if(xdiff>0) direction = "right";
if(xdiff<0) direction = "left";
change(0);
}
//-->
</script>