拖动对象的代码

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<SCRIPT LANGUAGE="JavaScript"><!--var currentMoveObj = null;    //当前拖动对象var relLeft;    //鼠标按下位置相对对象位置var relTop;function f_mdown(obj){    currentMoveObj = obj;        //当对象被按下时，记录该对象    currentMoveObj.style.position = "absolute";    relLeft = event.x - currentMoveObj.style.pixelLeft;    relTop = event.y - currentMoveObj.style.pixelTop;}window.document.onmouseup = function(){    currentMoveObj = null;    //当鼠标释放时同时释放拖动对象}function f_move(obj){    if(currentMoveObj != null)    {        currentMoveObj.style.pixelLeft=event.x-relLeft;        currentMoveObj.style.pixelTop=event.y-relTop;    }}//--></SCRIPT><BODY><TABLE width="100" border=1 onselectstart="return false" style="position:absolute;left:50;top:50" onmousedown="f_mdown(this)" onmousemove="f_move(this)"><TR>    <TD bgcolor="#CCCCCC" align="center" style="cursor:move">title1</TD></TR><TR>    <TD align="center" height="60">content</TD></TR></TABLE><TABLE width="100" border=1 onselectstart="return false" style="position:absolute;left:350;top:250" onmousedown="f_mdown(this)" onmousemove="f_move(this)"><TR>    <TD bgcolor="#CCCCCC" align="center" style="cursor:move">title2</TD></TR><TR>    <TD align="center" height="60">content</TD></TR></TABLE></BODY>