Para javascript te cambio un par de cosas...
Código HTML:
Ver original<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <script language="JavaScript" type="text/JavaScript"> function salta(e,t){
var k=null;
(e.keyCode) ? k=e.keyCode : k=e.which;
if(k==13){
document.getElementById(t).focus();
}
}
function envia(obj){
obj.submit();
return true;
}
<form action="" method=""> <input type="text" id="a" value="" onKeyUp="salta(event,'b');"> <input type="text" id="b" value="" onKeyUp="salta(event,'c');"> <input type="text" id="c" value="" onKeyUp="salta(event,'d');"> <input type="text" id="d" value="" onKeyUp="salta(event,'e');"> <input type="text" id="e" value="" onKeyUp="salta(event,'botenviar');"> <input type="button" name="botenviar" id="botenviar" value="Enviar" onClick="envia(this.form)">
Quim