function dcform(theForm)
 {
	var ch=0;
	for(i=0;i< theForm.document.all.dc.length;i++ )
	{
	if (theForm.document.all.dc[i].checked==true)
	{
	ch=1;
	}
	}
	
	if (ch==0)
	{
	alert('请至少选择一项！');
	return false;
	}

  }
document.write("<form id='form1' name='form1' method='post' action='/dc/ups_save.asp' target='_blank' onSubmit='return dcform(this)' ><table width='100%' border='0' cellspacing='0' cellpadding='0'><tr><td height='5'></td></tr><tr><td height='25' bgcolor='#fd9204'>&nbsp;&nbsp; <font color='#FFFFFF'><b>您是怎么找到本网站的?</b></font></td></tr><tr><td height='5'></td></tr><tr><td height='1' bgcolor='#CCCCCC'></td></tr><tr><td height='10' ></td></tr><tr><td><table width='97%' border='0' align='center' cellpadding='3' cellspacing='0'><tr><td width='3%'><input type='radio' name='dc' value='1' /></td><td width='97%'>&nbsp; 从搜索引擎处得知的</td></tr><tr><td><input type='radio' name='dc' value='2' /></td><td>&nbsp; 广告杂志</td></tr><tr><td><input type='radio' name='dc' value='3' /></td><td>&nbsp; 其他</td></tr><tr><td>&nbsp;</td><td><input type='image' name='imageField' src='/dc/img/00.jpg' />&nbsp; <a href='/dc/index.asp' target='_blank'><img src='/dc/img/01.jpg' width='48' height='18' border='0' /></a></td></tr></table></td></tr></form></table>");