如何获取层坐标
<DIV id=dd style="POSITION: absolute; visibility: hidden;"></DIV>
<form action="?save=1" name="form1" method="post">
<input name="div_left" type="hidden" id="div_left">
<input name="div_rig" type="hidden" id="div_rig">
<input type="submit" name="Submit" value="保存设置">
<form>
是这样的,我想把层DDX坐标与Y坐标分别写入表单div_left与div_rig中,该如何,请教