Click the button to move the form element around

Last Update:2016-11-07 Source: Internet

Author: User

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HTML

<! DOCTYPE html>


  <meta charset= "UTF-8" >
  <title> Mobile Option</title>
  <style type= "Text/css" >
  Select {
  width:200px;
  }
?
  . Box {
  Float:left;
  }
  </style>
<body>
  <div class= "box" >
  <select size= "8" id= "Left-select" >
  <option value= "" >1</option>
  <option value= "" >2</option>
  <option value= "" >3</option>
  <option value= "" >4</option>
  <option value= "" >5</option>
  <option value= "" >6</option>
  <option value= "" >7</option>
  <option value= "" >8</option>
  </select>
  <br>
  <button id= "left_up" > Move Up </button>
  <button> Move Down </button>
  <button id= "right" > moving to the left </button>
  <button id= "Right_all" > All right Shift </button>
  </div>
  <div class= "box" >
  <select size= "8" id= "Right-select" >
  <option value= "" >1</option>
  <option value= "" >2</option>
  <option value= "" >3</option>
  <option value= "" >4</option>
  <option value= "" >5</option>
  <option value= "" >6</option>
  <option value= "" >7</option>
  <option value= "" >8</option>
  </select>
  <br>
  <button> Move Up </button>
  <button> Move Down </button>
  <button> Move left </button>
  <button> left shift all </button>
  </div>
  <script src= "./js/Mobile Option.js" ></script>
</body>

JavaScript(function () {
  var leftselect = document.getElementById (' Left-select ');
  var rightselect = document.getElementById (' Right-select ');
  var leftupbtn = document.getElementById (' left_up ');
  var rightbtn = document.getElementById (' right ');
  var rightallbtn = document.getElementById (' Right_all ');
?
  Leftupbtn.onclick = function () {
  var index = Leftselect.selectedindex;
  //If option is not selected in Select, subsequent operations are not performed
  if (index!==-1) {
  var option = Leftselect.options[index];
?
  if (index = = = 0) {
  leftselect.appendchild (option);
  } else {
  leftselect.insertbefore (option, leftselect.options[index-1]);
  }
  }
  };
?
  Rightbtn.onclick = function () {
  var index = Leftselect.selectedindex;
  if (index!==-1) {
  var option = Leftselect.options[index];
?
  rightselect.appendchild (option);
  }
  };
?
  Rightallbtn.onclick = function () {
For  (var i = 0; i < leftSelect.options.length;) {
  Rightselect.appendchild (Leftselect.options[i]);
  }
  };
})();
Click the button to move the form element around

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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