var subsmallclassid = new Array();

subsmallclassid[0] = new Array(1,8,'互联网')

subsmallclassid[1] = new Array(1,9,'网络资源')

subsmallclassid[2] = new Array(1,10,'网络游戏')

subsmallclassid[3] = new Array(1,11,'下载')

subsmallclassid[4] = new Array(2,12,'电脑硬件')

subsmallclassid[5] = new Array(2,13,'电脑软件')

subsmallclassid[6] = new Array(2,14,'操作系统')

subsmallclassid[7] = new Array(2,15,'电脑基础')

function changesmallclassid(selectValue)
{
document.getElementById('smallclassid').length = 0;
document.getElementById('smallclassid').options[0] = new Option('-选择-','');
for (i=0; i<subsmallclassid.length; i++)
{
if (subsmallclassid[i][0] == selectValue)
{
document.getElementById('smallclassid').options[document.getElementById('smallclassid').length] = new Option(subsmallclassid[i][2], subsmallclassid[i][1]);
}
}
}
function changesmallerclassid(selectValue)
{
document.getElementById('smallerclassid').length = 0;
document.getElementById('smallerclassid').options[0] = new Option('-选择-','');
for (i=0; i<subsmallclassid.length; i++)
{
if (subsmallclassid[i][0] == selectValue)
{
	document.getElementById('smallerclassid').style.display='';
	document.getElementById('smallerclassid').options[document.getElementById('smallerclassid').length] = new Option(subsmallclassid[i][2], subsmallclassid[i][1]);
}
}
}


document.write ("<select name='classid' id='classid' style='width:120px' size='8' onChange='changesmallclassid(this.value)'>");
document.write ("<option value='' selected>-选择-</option>");

document.write ("<option value=1>网络</option>");

document.write ("<option value=2>电脑</option>");

document.write ("</select>")

document.write ("  <select name='smallclassid' size='8' onChange='changesmallerclassid(this.value)' style='width:120px' id='smallclassid'>");
document.write ("<option value='' selected>-选择-</option>");
document.write ("</select>")
document.write ("  <select name='smallerclassid' size='8' style='display:none;width:120px' id='smallerclassid'>");
document.write ("<option value='' selected>-选择-</option>");
document.write ("</select>")