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Javascript Swear Word Filter

Article by:

Premshree Pillai (8/16/2002)

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Summary:

This JavaScript is a "Word Filter". It is a type of form validator. When the user submits some text, the validator will check the text for words that has to be filtered.

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Javascript Swear Word Filter

This JavaScript is a "Word Filter". It is a type of form validator. When the user submits some text, the validator will check the text for words that has to be filtered.

The words that have to be filtered must be added to the array swear_words_arr. When the user types the text and hits the submit button, if the text contains any word that is present in the array swear_words_arr, the form will not be submitted.

The script can be used for validation of swear words etc.

Place the following code in the head tag of your page.

Select All Code

<!--BEGIN WORD FILTER JAVASCRIPT--><script language="JavaScript1.2">

// Word Filter
// (c) 2002 Premshree Pillai
// Created : 23 June 2002
// http://www.qiksearch.com
// http://javascript.qik.cjb.net
// E-mail : qiksearch@rediffmail.com

var swear_words_arr=new Array("fuck","bloody","war","terror");
var swear_alert_arr=new Array;
var swear_alert_count=0;

function reset_alert_count()
{
 swear_alert_count=0;
}

function validate_user_text()
{
 reset_alert_count();
 var compare_text=document.form1.user_text.value;
 for(var i=0; i<swear_words_arr.length; i++)
 {
  for(var j=0; j<(compare_text.length); j++)
  {
   if(swear_words_arr[i]==compare_text.substring(j,(j+swear_words_arr[i].length)).toLowerCase())
   {
    swear_alert_arr[swear_alert_count]=compare_text.substring(j,(j+swear_words_arr[i].length));
    swear_alert_count++;
   }
  }
 }
 var alert_text="";
 for(var k=1; k<=swear_alert_count; k++)
 {
  alert_text+="\n" + "(" + k + ")  " + swear_alert_arr[k-1];
 }
 if(swear_alert_count>0)
 {
  alert("The form cannot be submitted.\nThe following illegal words were found:\n_______________________________\n" + alert_text + "\n_______________________________");
  document.form1.user_text.select();
 }
 else
 {
  document.form1.submit();
 }
}

function select_area()
{
 document.form1.user_text.select();
}

window.onload=reset_alert_count;

</script><!--END WORD FILTER JAVASCRIPT-->

Now here's the form:

Select All Code

<form name="form1" method="post" action="/your_post_address.html">
<center><font face="Times New Roman" size="6pt" color="#606060"><b><i>Word Filter</i></b></font></center>
<table><tr><td></td></tr></table>
<textarea rows="3" cols="40" name="user_text" style="border:2 solid #808080; font-family:verdana,arial,helvetica; font-weight:normal; font-size:10pt" onclick="select_area()">Enter your text here...</textarea>
<table><tr><td></td></tr></table>
<center><input type="button" style="background:#EFEFEF; border:2 solid #808080; width:100%; cursor:pointer" value="Submit" onclick="validate_user_text();"></center>
</form></form>

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