Question

javascrip telling how many words remaining in the text box

Asked by: lilyyan

Hello,

I have text area in my html, i want  the numbers of words which are  input by user is not greater than 200 words. When user input the words, there is promt showing beside the text area that tells user how many words are remaining. how to implement this function? An example will be appreciated!
Regards,
lilyyan

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Asked On
2007-04-26 at 07:37:37ID22535940
Tags

words

,

how

,

many

,

remaining

Topic

JavaScript

Participating Experts
2
Points
300
Comments
6

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Answers

 

by: rkannan2000Posted on 2007-04-26 at 08:00:11ID: 18982095

 

by: _Marcel_Posted on 2007-04-26 at 08:00:24ID: 18982097

Here is a javascript example from one of the websites I have build, and underneath is the HTML snippet with the field etc.

<script>
function CountWords (this_field) {
      var char_count = this_field.value.length;
      var fullStr = this_field.value + " ";
      var initial_whitespace_rExp = /^[^A-Za-z0-9]+/gi;
      var left_trimmedStr = fullStr.replace(initial_whitespace_rExp, "");
      var non_alphanumerics_rExp = rExp = /[^A-Za-z0-9]+/gi;
      var cleanedStr = left_trimmedStr.replace(non_alphanumerics_rExp, " ");
      var splitString = cleanedStr.split(" ");
      var word_count = splitString.length -1;

      if (fullStr.length <2) {
            word_count = 0;
      }
      if (word_count == 1) {
            wordOrWords = " word";
      } else {
            wordOrWords = " words";
      }

      var retstring = word_count + " " + wordOrWords
      document.getElementById('wrdcnt').innerHTML=retstring;

      if (word_count>200) {
            if(document.layers){ document.layers["q"].bgColor = '#ff0000'; }
            else { document.getElementById('wrdcnt').style.backgroundColor = '#ff0000'; }
      } else {
            if(document.layers){ document.layers["q"].bgColor = '#ffffff'; }
            else { document.getElementById('wrdcnt').style.backgroundColor = '#ffffff'; }
      }
}
</script>

<table cellspacing="2" cellpadding="2" class="bodystyle">
            <tr>
                  <td class="formtitle">Summary<span class="obligatory">*</span><br><br>used:<br><div id="wrdcnt"></div></td>
                  <td><textarea name="summary" id="summary" value="" cols="35" rows="12" onKeyDown="CountWords(document.step.summary);"></textarea></td>
            </tr>
      </table>

 

by: lilyyanPosted on 2007-04-26 at 08:13:05ID: 18982207

hi, thanks so much for your reply. it seems there is an error while i testing the script. the error is:"document.step.summary" is null or not an object

 

by: _Marcel_Posted on 2007-04-26 at 10:32:23ID: 18983503

Ah... I suppose I've missed copying the form that contains the textarea. Do it something like this:

<form name="step">
<table cellspacing="2" cellpadding="2" class="bodystyle">
            <tr>
                  <td class="formtitle">Summary<span class="obligatory">*</span><br><br>used:<br><div id="wrdcnt"></div></td>
                  <td><textarea name="summary" id="summary" value="" cols="35" rows="12" onKeyDown="CountWords(document.step.summary);"></textarea></td>
            </tr>
      </table>
</form>

 

by: lilyyanPosted on 2007-04-26 at 12:43:50ID: 18984566

hi, thanks so much for your answer. this script works great ! just wondering what does document.layers["q"] meaning, may you exaplain a little bit?

 

by: _Marcel_Posted on 2007-04-26 at 23:12:35ID: 18987023

Hmmmm ... In this example q should be replaced by wrdcnt. It points to the wrdcnt span. (The code I use on our live environment is a bit obfuscated, so I changed most variables back to a normal word. I obviously forgot this q variable. You will only notice it in older Netscape browsers). But to make the script a bit better change it to wrdcnt:

if (word_count>200) {
            if(document.layers){ document.layers["wrdcnt"].bgColor = '#ff0000'; }
            else { document.getElementById('wrdcnt').style.backgroundColor = '#ff0000'; }
      } else {
            if(document.layers){ document.layers["wrdnt"].bgColor = '#ffffff'; }
            else { document.getElementById('wrdcnt').style.backgroundColor = '#ffffff'; }
      }

20120131-EE-VQP-002

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