直接在table标签中设置下不就行了吗?这是静态的,如果要动态设置你会吗? function com_onresize(){ var contentsHeight = document.body.clientHeight; var buttonsHeight = document.getElementById( "buttons" ).offsetHeight; var head1Height = document.getElementById( "head1" ).offsetHeight; var head2Height = document.getElementById( "head2