Simple implementation of JavaScript image switching effect-JS Tutorial-php.cn

Simple implementation of JavaScript image switching effect

高洛峰

Release： 2016-12-03 16:30:58

Original

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This article analyzes two types of form submission methods in JS through examples. Share it with everyone for your reference, the details are as follows:

1. After the original

<form method="post" action="/student/stureg/add" id="form1" onsubmit="return subForm();">
<button type="submit" class="button red" style="font-size:18px; font-family:&#39;微软雅黑&#39;;">提 交</button>

Copy after login

button here is submitted, execute the subForm() method, subForm can verify the form, return false, and the form is not submitted. Otherwise submit.

function subForm()
{
  var flag = true;
  $(".required").each(function(){
    if(!$(this).val())
    {
      flag = false;
      $(this).css({ border: "1px solid #F56939",borderRadius:"5px",color:"#F56939",height:"26px"});
      $(this).attr("status","1").val("此处为必填项,请您填写！");
    }
  });
 /*$(".idCardNo").each(function(){
  if(!idCardNo($(this).val()))
  {
   flag = false;
   $(this).css({ border: "1px solid #F56939",borderRadius:"5px",color:"#F56939",height:"26px"});
   if($(this).attr("status")!=1){
    $(this).attr("status","1").val("请填写正确的身份证号码！");
   }
  }
 });*/
 var reg = new RegExp("^[0-9]*$");
 $(".number").each(function(){
  if(!reg.test($(this).val()))
  {
   flag = false;
   $(this).css({ border: "1px solid #F56939",borderRadius:"5px",color:"#F56939",height:"26px"});
   if($(this).attr("status")!=1){
    $(this).attr("status","1").val("请填写正确的联系电话！");
   }
  }
 });
 $(".exCardNo").each(function(){
  if(exCardNo($(this).val())==1)
  {
   flag = false;
   $(this).css({ border: "1px solid #F56939",borderRadius:"5px",color:"#F56939",height:"26px"});
   if($(this).attr("status")!=1){
    $(this).attr("status","1").val("此身份证已报名！");
   }
  }
 });
  return flag;
}

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Various verifications!

Submit set by 2.js

<form method="post" action="/student/stureg/reglogin" id="form_login">
<a id="submit"><img src="/images/login/login_bt.png" style="cursor:pointer"/></a>

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This is not a submit button, but a simulated submit button.

$("#submit").click(function(){
   if(loginForm())
   {
     $("#form_login").submit();
   }
});

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triggers the submission event. Using

onsubmit="return loginForm();" here has no effect. It will be submitted regardless of whether false is returned. So you need to do some verification before actually submitting it.

function loginForm(){
 var flag = true;
 $(".notnull").each(function(){
  if(!$(this).val())
  {
   flag = false;
   $(this).css({ border: "1px solid #F56939",borderRadius:"5px",color:"#F56939",height:"26px"});
   $(this).attr("status","1").val("不能为空");
  }
 });
 return flag;
}

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Return false and the submit method will not be called.

These are two ways to handle the prelude to form submission.