form

[carbalga]

Esto te puede ayudar:

<script languaje="JavaScript">


var user = "" ;
var pass = "" ;
while ( user != "colima" || pass != "tibas" )
{
user = prompt ("Introduzca su login: " , "" )
pass = prompt ("Introduzca su password: " , "" )
}
alert ("Bienvenido a Redetur.");
</script>