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No permitir ingresar ciertos caracteres en un input

/ Published in: JavaScript
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  1. function validarn(e) { // 1
  2.     tecla = (document.all) ? e.keyCode : e.which; // 2
  3.     if (tecla==8) return true; // 3
  4. 	 if (tecla==9) return true; // 3
  5. 	 if (tecla==11) return true; // 3
  6.     patron = /[A-Za-zñÑ'áéíóúÁÉÍÓÚàèìòùÀÈÌÒÙâêîôûÂÊÎÔÛÑñäëïöüÄËÏÖÜ\s\t]/; // 4
  7.  
  8.     te = String.fromCharCode(tecla); // 5
  9.     return patron.test(te); // 6
  10. } 
  11.  
  12.  
  13.  
  14. <input type="text" class="inputText" name="nombre" onkeypress="return validarn(event)" />

URL: http://www.telefonica.net/web2/blas-mar/validarformu.html

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