charAt()
<script type="text/javascript"> function scharAt() { var texto = 'mau%\SR=+t$@ 098mu hjor \\\a'; var indice = Number(document.form.indice.value); if (isFinite(indice) && indice == 0 || indice <= texto.length-1) { document.form.resultado.value = texto.charAt(indice); }else{ alert('Entre um índice válido'); }; }; <script>
<p>string:<br /><b> mau%\sr=+t$@ 098mu hjor \\\a</b></p> <form name="form" action="" method="get"> <label>Índice: <input type="text" name="indice" size="2" maxlength="2" value="0" /></label> <button type="button" onclick="scharAt()">string.charAt()</button> = <input type="text" name="resultado" size="1" maxlength="2" class="dest" /> </form>
string:
mau%\SR=+t$@ 098mu hjor \\\a