Javascript验证输入信息

 

 1     function CheckData()
 2     {
 3         if(document.addAdminForm.txtAccount.value == "")
 4         {
 5             alert("用户名不能为空！");
 6             return false;
 7         }
 8         if(document.addAdminForm.txtPass1.value == "")
 9         {
             alert("密码不能为空！");
             return false;
         }
         if(document.addAdminForm.txtPass2.value == "")
         {
             alert("密码确认不能为空！");
             return false;
         }
         if(document.addAdminForm.txtPass1.value != document.addAdminForm.txtPass2.value)
         {
             alert("两次密码输入不一致");
             return false;
         }
         
         //检查邮箱地址
         if(document.addAdminForm.txtEmail.value != "")
         {
             var reg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/;
             if(!reg.test(document.addAdminForm.txtEmail.value))
             {
                 alert("Email格式不正确！");
                 return false;
             }
             return true;
         } 
     }