<html>
<header>
<script language="javascript">
function NoSpace()
{
var oTBox = document.getElementById("p");
var sTmp = oTBox.value;
sTmp = sTmp.replace(/\s+/g,"");
alert(sTmp);
oTBox.value = sTmp;
}
</script>
</header>
<body>
<input name="MonTextbox" type="text" id="p" value="Salut tout le monde !"><br>
<input type="Submit" value="Enlever les espaces" onClick="NoSpace()"><br>
</body>
</html>