function valFrom(){
var userName=document.getElementById("userName");
var pwd=document.getElementById("pwd");
var repwd=document.getElementById("repwd");
var email=document.getElementById("email");
var age=document.getElementById("age");
if(userName.value==""){
alert("用户名不能为空!");
return false;
}else if(userName.value.length<4||userName.value.length>16){
alert("用户长度不符合规则!\n用户名应为4-16个字符");
return false;
}else if(pwd.value!=repwd.value){
alert("两次输入的密码不一致!");
return false;
}else if(email.value.indexOf(".")<0||email.value.indexOf("@")<0){
alert("邮箱格式不正确!");
return false;
}else if(parseInt(age.value)<18||parseInt(age.value)>80){
alert("年龄不符合要求!");
return false;
}else{
document.forms[0].action="j.html";
document.forms[0].submit(); }
}
function resetForm(){
document.forms[0].reset();
}
