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Block unwanted html tags in a textarea

P: 2
Can anyone offer advice on how to stop users entering html tags in the textarea part of a form ?
Aug 20 '09 #1
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2 Replies

Expert Mod 5K+
P: 8,639
you can use a RegExp to remove anything that looks like "<some_chars>" afterwards. you can also check, if the character entered is "<" or ">", although this will also trigger for "f(x) < f(x+dx)" or "I <-- running away".
Aug 20 '09 #2

P: 2
thanks for the reply Dormilich.

Ideally I want to pop an alert box if the textarea has the text href in it.

My javascript is poor but I got it to work with ..

Expand|Select|Wrap|Line Numbers
  1. if (objForm.faultReport.value.length >= 2)
  2.             {        
  3.                 var invalid  ="href";
  4.                 var strData = objForm.faultReport.value;
  6.                 gb_val = strData.indexOf(invalid);
  8.                 if(gb_val>0)
  9.                 {
  10.                 alert("illegal text in the Comments box\n Please re-enter text");
  11.                 return(false);
  12.                 }
  13.             }
Aug 20 '09 #3

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