Capítulo 7

String length

JavaScript

<script type="text/javascript">
	function sLength() {
		var s = document.form.texto.value;
		if (s != '') {
		document.form.comprimento.value = s.length;
		}else{
		document.form.texto.value = 'Entre uma string';
		}
	};
<script>

HTML

<form name="form" action="" method="get">
<label>String: <input type="text" name="texto" maxlength="100" /></label> 
<button type="button" onclick="sLength()">string.length</button> = 
<input type="text" name="comprimento" size="3"  maxlength="3" />
</form>
=