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fantasma

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Ah desculpa. Tente isso ...

<html>
<head>
<title>Untitled Document</title>
</head>

<body>
<form name="formulario">
<input type="text" name="numero" onBlur="concatenacao();">
<script language="javascript">
function concatenacao()
{
var num = document.formulario.numero.value;
var qtd = num.length;
var sobra = 10 - qtd;
var zeros = "";
for(var i =0;i<sobra;i++)
{
     zeros = zeros+'0';
}
var concatenar = substr(zeros,-sobra);
alert(concatenar);
}
</script>
</formulario>
</body>
</html>

Edited by Renato Penna
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