[查看演示] 源码如下
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<script>var isDraging=false;var ox,oy;function fnDown(){ isDraging=true; ox=event.offsetX; oy=event.offsetY; mid.setCapture();}function fnMove(){if(event.button!=1) fnRelease();if(isDraging){ var th=event.y-oTable.offsetTop-oy; if (th<1) th=1; if(th+parseInt(mid.height)>parseInt(oTable.height)) th=parseInt(oTable.height)-parseInt(mid.height); up.height=th; }}function fnUp(){fnRelease();}function fnRelease(){ isDraging=false; mid.releaseCapture();}</script><BODY><TABLE id=oTable width=200 height=250 border=1 cellspacing="0" cellpadding="0" ><TR> <TD id=up bgColor=#330099></TD></TR><TR> <TD id=mid height=40 bgColor=#3366CC onmousedown="fnDown()" onmousemove="fnMove()" onmouseup="fnUp"></TD></TR><TR> <TD id=down bgColor=#330099></TD></TR></TABLE></BODY>
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