// JavaScript Document
function CheckForm(){
var str;
str='';
if(document.messform.carid.value=='') str=str+'请填写汽车车型\n';
if(document.messform.brand.value=='') str=str+'请填写汽车品牌\n';
if(document.messform.seat.value=='') str=str+'请填写座位数\n';
if(document.messform.seat.value!=''&& isNaN(document.messform.seat.value)) str=str+'座位数为数字\n';
if(document.messform.way.value=='') str=str+'请填写每日里程\n';
if(document.messform.price.value=='') str=str+'请填写短租价格\n';
if(document.messform.price.value!='' && isNaN(document.messform.price.value)){str=str+'短租价格为数字\n';}
if(document.messform.price1.value=='') str=str+'请填写长租价格\n';
if(document.messform.province.value=='') str=str+'请填写所在城市\n';
if(document.messform.username.value=='') str=str+'请填写车主姓名\n';
if(document.messform.userid.value==''){str=str+'请填写身份证\n';}
if(document.messform.userid.value!='' && isNaN(document.messform.userid.value)){str=str+'身份证由数字组成\n';}
if(document.messform.userid.value!='' && document.messform.userid.value.length>18){str=str+'身份证不超过18位\n';}
if(document.messform.tel.value=='') str=str+'请填写联系电话\n';
if(document.messform.carnum.value=='') str=str+'请填写车牌号\n';
if(str!=''){
str='请按要求填写登记信息！\n\n'+str;
alert(str);
return false;
}
}