function clear(o){
l=o.length;
for (i = 0; i < l; i ++){
	o.options[0]=null;
}
}
function sdistrict(oj,v){
clear(oj);
if(v == "")
{
oj.add(new Option("请选择情景","0"));
}
else
{
	if (v=='A')
	{
	oj.add(new Option("情路漫漫","1"));
	oj.add(new Option("寂寞长路","2"));
	oj.add(new Option("疲惫之歌","3"));
	oj.add(new Option("情谊之旅","4"));
	oj.add(new Option("我心飞扬","5"));
	}
	else
	{
	oj.add(new Option("雨夜情怀","1"));
	oj.add(new Option("高速激情","2"));
	oj.add(new Option("田野徜徉","3"));
	oj.add(new Option("都市丛林","4"));
	oj.add(new Option("山路弯弯","5"));
	}
	}
}
function checkData()
{
	var blog = document.form_upload.blog.value;
	if(document.form_upload.zuti.value == "")
	{
		alert("请选择主题");
		document.form_upload.zuti.focus();
		return false;
	}
	if(document.form_upload.lanmu_a.value == "0")
	{
		alert("请选择情景");
		document.form_upload.lanmu_a.focus();
		return false;
	}
	if(document.form_upload.song1.value == "")
	{
		alert("请至少输入一个乐曲");
		document.form_upload.song1.focus();
		return false;
	}
	if(document.form_upload.author1.value == "")
	{
		alert("请至少输入一个乐曲演唱者");
		document.form_upload.author1.focus();
		return false;
	}
	
	if(blog != "" && blog.indexOf("http://blog.sina.com.cn/")==-1)
	{
		alert("请输入正确的新浪博客文章地址");
		document.form_upload.blog.focus();
		return false;
	}
	return true;
}
document.write('<div class="f_box">');
document.write('<div class="f_tt">');
document.write('<span>网友自助上传</span>');
document.write('<span class="mbar"><img src="http://www.sinaimg.cn/qc/xinchedaodian/qicheyinyue/music_bar.gif" width="47" height="13" alt="" \/></span>');
document.write('</div>');
document.write('<form action="http://supports.auto.sina.com.cn/auto_music/up.php" method="post" id="form_upload" name="form_upload" onsubmit="checkData();">');
document.write('<input type="hidden" name="cmd" value="sub" \/>');
document.write('<table width="100%" border="0" cellspacing="0" cellpadding="0">');
document.write('<tr><td><select onclick="javascript:sdistrict(document.form_upload.lanmu_a,this.value)" name="zuti" id="zuti"><option value="">请选择主题</option><option value="A">车之情</option><option value="B">车之境</option></select></td><td colspan=2><select name="lanmu_a"><option value="0" selected>请选择情景</option></select></td>');
document.write('<td width="30" rowspan="8" valign="bottom"><input type="submit" class="btn_send" value="&nbsp;" \/></td></tr>');
document.write('<tr><td colspan=3>乐曲：<input type="text" name="song1" \/></td></tr>');
document.write('<tr><td colspan=3>演唱：<input type="text" name="author1"  \/></td></tr>');
document.write('<tr><td colspan=3>乐曲：<input type="text" name="song2"  \/></td></tr>');
document.write('<tr><td colspan=3>演唱：<input type="text" name="author2"  \/></td></tr>');
document.write('<tr><td colspan=3>乐曲：<input type="text" name="song3"  \/></td></tr>');
document.write('<tr><td colspan=3>演唱：<input type="text" name="author3" \/></td></tr>');
document.write('<tr><td colspan=3>理由：<input type="text" name="blog" \/><br>(请输入文章的新浪博客地址)</td></tr>');
document.write('</table>');
document.write('</form>');
document.write('</div>');