javascript控制打印局部内容

function printing(tb)
{
var nw = window.open('','','width=800,height=600')
nw.document.open("text/html","gb2312")
<!--nw.document.write("<link rel='stylesheet' type='text/css' href='css/XXX.css'>")-->
nw.document.write("<object classid='CLSID:8856F961-340A-11D0-A96B-00C04FD705A2' id='wb' height='0' width='0'></object>")
nw.document.write(document.getElementById(tb).outerHTML)
nw.document.write("<scrip"+"t>document.all.wb.ExecWB(7,1)</sc"+"ript>")
}

<DIV id=commontxtbox>要打印的内容，要打印的内容，要打印的内容，要打印的内容，要打印的内容，</DIV>
<A href="javascript:printing('commontxtbox')">打印此页</A>