图片长度过长时,用鼠标拖动观看

<style>

<!--
.drag{position:relative;cursor:hand}
-->
</style>

<script language="JavaScript1.2">
<!--

var dragapproved=false
var z,x,y

function move()
{
if (event.button==1&&dragapproved)
{
z.style.pixelLeft=temp1+event.clientX-x
z.style.pixelTop=temp2+event.clientY-y
return false
}
}


function drags()
{
if (!document.all)
return
if (event.srcElement.className=="drag")
{
dragapproved=true
z=event.srcElement
temp1=z.style.pixelLeft
temp2=z.style.pixelTop
x=event.clientX
// y=event.clientY
document.onmousemove=move
}
}

document.onmousedown=drags
document.onmouseup=new Function("dragapproved=false")
//-->
</script>
<table width=743><tr><td style='LEFT: 0px; WIDTH: 743; WORD-WRAP: break-word' valign=top ><span style="display:block;padding:0px 10px">
<IMG SRC="http://lydsgw.com/feiteng/bbsgood/upload/hs1%2Ejpg" border=0 title='自叙帖墨迹本' class=drag></td></tr></table>