首先在自定义表单创建ip和liuyantime两个字段，用文本类型就行。然后在对应的表单添加以下代码：
<input type="hidden" name="ip" id="ip" value="">
<input type="hidden" name="liuyantime" id="liuyantime" value="">
<script type="text/javascript">
window.onload=function(){
varnowDate=newDate();
varstr=nowDate.getFullYear()+"-"+(nowDate.getMonth()+1)+"-"+nowDate.getDate()+""+nowDate.getHours()+":"+nowDate.getMinutes()+":"+nowDate.getSeconds();
document.getElementById("liuyantime").value=str;
}
</script>
<script type="text/javascript"src="http://pv.sohu.com/cityjson/getip.aspx"charset="utf-8"></script>
<script type="text/javascript">
var ip=returnCitySN.cip+"-"+returnCitySN.cname;
document.getElementById("ip").value=ip;
</script>