document.write('<table align=center border=0><tbody><tr><td><select id=mainclassid name=mainclassid><option value=?>请选择项目</option></select></td></tr><tr><td><input type=text id=mnewkeyword name=mnewkeyword size=8></td></tr><tr><td><input type=submit value=站内搜索 name=mB1 onclick=location.href=document.getElementById("mainclassid").value+"&newkeyword="+escape(document.getElementById("mnewkeyword").value); /><a href="#"></a></td></tr></tbody></table>');