Textarea and javascript

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  • CiscoGuy
    #1

    Textarea and javascript

    Is it possible to read each line from a HTML textarea into a
    javascript array. For example:
    If I were to input into the textarea:
    1
    4
    6
    3
    Could I somehow have javascript read it so:
    array[1]=1
    array[2]=4
    array[3]=6
    array[4]=3

    And also, is it possible to find how many lines long a textarea is?

    Thanks for the help, it is greatly appreciated.
    Tags: None
    • Lee
      #2
      Re: Textarea and javascript

      CiscoGuy said:[color=blue]
      >
      >Is it possible to read each line from a HTML textarea into a
      >javascript array. For example:
      >If I were to input into the textarea:
      >1
      >4
      >6
      >3
      >Could I somehow have javascript read it so:
      >array[1]=1
      >array[2]=4
      >array[3]=6
      >array[4]=3
      >
      >And also, is it possible to find how many lines long a textarea is?
      >
      >Thanks for the help, it is greatly appreciated.[/color]

      Note that the first element of an array is indexed as 0,
      not 1. Otherwise, this seems to be generally what you want:

      <html>
      <head>
      <script type="text/javascript">
      function textareaToArray (t){
      return t.value.split(/[\n\r]+/);
      }
      function showArray(a){
      var msg="";
      for(var i=0;i<a.length; i++){
      msg+=i+": "+a[i]+"\n";
      }
      alert(msg);
      }
      </script>
      </head>
      <body>
      <form>
      <textarea rows="10" cols="20" name="alpha"></textarea>
      <br>
      <input type="button"
      value="show array"
      onclick="showAr ray(textareaToA rray(this.form. alpha))">
      </form>
      </body>
      </html>

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