js style动态设置table高度

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" ）.offsetHeight;var t1 = document.getElementById（ "TableContainer1" ）.style.height;var t2 = document.getElementById（ "TableContainer2" ）.style.height;//alert（document.getElementById（ "TableContainer1" ）.style.height）;var h = contentsHeight - buttonsHeight - head1Height - head2Height - 13;if（h < 110）{return;}document.getElementById（ "TableContainer1" ）.style.height = h/2 + "px";document.getElementById（ "TableContainer2" ）.style.height = h/2 + "px";}function com_sbs_pagesize（）{var screenHeight = window.screen.height;var availHeight = window.screen.availHeight;//alert（document.getElementById（ "TableContainer1" ）.children[0].rows.length）;var index = document.getElementById（ "TableContainer1" ）.children[0].rows.lengthvar buttonsHeight = document.getElementById（ "buttons" ）.offsetHeight;var head1Height = document.getElementById（ "head1" ）.offsetHeight;var head2Height = document.getElementById（ "head2" ）.offsetHeight;var mainH = buttonsHeight + head1Height +head2Height + 13;//20:scroll 35:title 25:trwhile （（availHeight-mainH） < （20 + 35 + 25*index）*2）{ index = index - 1;}var tableHeight = 20 + 35 + 25*index;document.getElementById（ "TableContainer1" ）.style.height = tableHeight + "px";document.getElementById（ "TableContainer2" ）.style.height = tableHeight + "px";window.resizeTo（document.body.offsetWidth,mainH + tableHeight*2）;}