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js form login verification example

Dec 09, 2016 pm 04:08 PM

The example in this article describes the js form login verification method. Share it with everyone for your reference, the details are as follows:

&lt;!DOCTYPE html PUBLIC &quot;-//W3C//DTD XHTML 1.0 Transitional//EN&quot;
&quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&quot;&gt;
&lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;
&lt;head&gt;
&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=utf-8&quot; /&gt;
&lt;title&gt;项目后台管理系统&lt;/title&gt;
&lt;link rel=&quot;stylesheet&quot; href=&quot;__PUBLIC__/css/login.css&quot; /&gt;
&lt;script type=&quot;text/javascript&quot; src=&quot;__PUBLIC__/js/jquery.min.js&quot;&gt;&lt;/script&gt;
&lt;script type=&quot;text/javascript&quot;&gt;
function $(id)
{
  return document.getElementById(id);
}
//验证姓名
function checkname(){
  var name=$(&quot;admin_name&quot;).value;
  if(name==&#39;&#39;)
  {
   $(&#39;s1&#39;).innerHTML=&#39;姓名不能为空&#39;;
   $(&#39;s1&#39;).style.color=&#39;red&#39;;
   return false;
  }
  else
  {
    $(&#39;s1&#39;).innerText=&#39;ok&#39;;
    $(&#39;s1&#39;).style.color=&#39;green&#39;;
    return true;
  }
}
//验证密码
function checkpwd(){
  var password=$(&quot;password&quot;).value;
  if(password==&#39;&#39;)
  {
   $(&#39;s2&#39;).innerHTML=&#39;密码不能为空&#39;;
   $(&#39;s2&#39;).style.color=&#39;red&#39;;
   return false;
  }
  else
  {
    $(&#39;s2&#39;).innerHTML=&#39;ok&#39;;
    $(&#39;s2&#39;).style.color=&#39;green&#39;;
    return true;
  }
}
//验证所有表单提交
function checkall()
{
  if(checkname()&amp;&amp;checkpwd())
  {
    return true;
  }
  else
  {
    return false;
  }
}
&lt;/script&gt;
&lt;/head&gt;
&lt;body class=&quot;b&quot;&gt;
&lt;div class=&quot;lg&quot;&gt;
&lt;form action=&quot;__URL__/dologin&quot; method=&quot;POST&quot; onsubmit=&quot;return checkall();&quot;&gt;
  &lt;div class=&quot;lg_top&quot;&gt;&lt;/div&gt;
  &lt;div class=&quot;lg_main&quot;&gt;
    &lt;div class=&quot;lg_m_1&quot;&gt;
    &lt;input name=&quot;admin_name&quot; value=&quot;&quot; class=&quot;ur&quot; id=&quot;admin_name&quot; onblur=&quot;checkname();&quot;/&gt;&lt;span id=&#39;s1&#39;&gt;&lt;/span&gt;
    &lt;input name=&quot;password&quot; type=&quot;password&quot; value=&quot;&quot; class=&quot;pw&quot; id=&quot;password&quot; onblur=&quot;checkpwd();&quot;/&gt;&lt;span id=&#39;s2&#39;&gt;&lt;/span&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  &lt;div class=&quot;lg_foot&quot;&gt;
  &lt;input type=&quot;submit&quot; value=&quot;Login In&quot; class=&quot;bn&quot; /&gt;&lt;/div&gt;
&lt;/form&gt;
&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;

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