function check_form() {
		name = document.getElementById("name").value;
		tel = document.getElementById("tel").value;
		email = document.getElementById("email").value;
		emsg = "";
		if(name == "") emsg += "姓名没有填写. \n";
		if(tel == "") emsg += "电话没有填写. \n";
		var pattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
		if(!pattern.test(email)) emsg += "邮件格式不正确. \n";
		if(emsg != "" ) {
			emsg = "------------------------------------------\n\n"+emsg;
			emsg = emsg+"\n------------------------------------------";
			alert(emsg);
			return false;
		}else {
			return true;
		}
	}

	function check_shijia() {
		name = document.getElementById("name").value;
		city = document.getElementById("city").value;
		hadcar = document.getElementById("hadcar").value;
		hadtime = document.getElementById("hadtime").value;
		tel = document.getElementById("tel").value;

		emsg = "";
		if(name == "") emsg += "姓名没有填写. \n";
		if(city == "") emsg += "所在地区没有填写. \n";
		if(hadcar == "") emsg += "现有车辆类型没有填写. \n";
		if(hadtime == "") emsg += "现有车辆购于何时没有填写. \n";
		if(tel == "") emsg += "电话没有填写. \n";
		if(emsg != "" ) {
			emsg = "------------------------------------------\n\n"+emsg;
			emsg = emsg+"\n------------------------------------------";
			alert(emsg);
			return false;
		}else {
			return true;
		}
	}

	function check_xcc() {
		name = document.getElementById("name").value;
		city = document.getElementById("city").value;
		hadcar = document.getElementById("hadcar").value;
		hadtime = document.getElementById("hadtime").value;
		adr = document.getElementById("adr").value;
		zip = document.getElementById("zip").value;
		tel = document.getElementById("tel").value;

		emsg = "";
		if(name == "") emsg += "姓名没有填写. \n";
		if(city == "") emsg += "所在地区没有填写. \n";
		if(hadcar == "") emsg += "现有车辆类型没有填写. \n";
		if(hadtime == "") emsg += "现有车辆购于何时没有填写. \n";
		if(adr == "") emsg += "邮寄地址没有填写. \n";
		if(zip == "") emsg += "邮编没有填写. \n";
		if(tel == "") emsg += "电话没有填写. \n";

		if(emsg != "" ) {
			emsg = "------------------------------------------\n\n"+emsg;
			emsg = emsg+"\n------------------------------------------";
			alert(emsg);
			return false;
		}else {
			return true;
		}
	}