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Validate for Special Characters

/ Published in: JavaScript
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Always always always backup client side validation with server side validation! =D

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  1. function validateSpecialChars(myStringID)
  2. {
  3.      // declare which special chars to validate
  4.      var illegalChars = "!@#$%^&*()+=-[]\\\';,./{}|\":<>?";
  5.      var strToSearch = document.getElementById(myStringID).value;
  6.  
  7.      for (var i = 0; i < strToSearch.length; i++) 
  8.      {
  9.   	if (illegalChars.indexOf(strToSearch.charAt(i)) != -1) 
  10.         {
  11.   	   alert ("Your search has one of the following special characters:\n" + iChars + "\nThese are not allowed.\nPlease remove them and try again.");
  12.   	return false;
  13.   	}
  14.      }
  15. }

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