var trade_ary = new Array();

          var phone_option = new Array();

		function trade_change(id,type)

        {

	      if (id!='')

	      {

		     var trade=document.getElementById("trade");

		     var phone=document.getElementById("phone");

		     trade.disabled = true;

		     phone.disabled = true;

		     phone.length=1;

		     if(type)

		     {trade_ary[id]=type;}

		     else if (!trade_ary[id]&&id!='')

		     {phone.options[0].text='载入中请稍候';

			  change_trade.src="http://www.xmindex.com.cn/mobile_list.php?id="+id;

			  //change_trade.src="http://192.168.8.2/xmindex/mobile_list.php?id="+id;

			  return true;}

		    for (i=0;i<trade_ary[id].length;i++){

			phone.add(new Option(trade_ary[id][i+1],trade_ary[id][i+1]));

			i++;}

		    phone.options[0].text='--手机型号--';

		    phone.options[0].value='0';

		    trade.disabled = false;

		    phone.disabled = false;

	    }

      }