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knightlibra
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FB bus
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function validar_letras(e){ tecla=(document.all)?e.keyCode:e.which; if (tecla==8) return true; patron=/[A-Za-z]/; te=String.fromCharCode(tecla); return patron.test(te);}function validar_numeros(e){ tecla=(document.all)?e.keyCode:e.which; if (tecla==8) return true; patron=/\d/; te=String.fromCharCode(tecla); return patron.test(te);}