挺有趣的，Jquery 回车切换tab功能的实现哦
<html> <head><!--jquery库.js--></head> <body> <form> 用户名：<input name='user'/> 密码：<input name='pwd' type='password'/> <input type='submit' value='登陆'/> </form> </body> </html>
js：
<script>
jQuery(document).ready(function () {
//按Enter鍵直接Tab
$("input[name='user']:first").focus();
var $target = $("input[name='user'],input[name='pwd'],button[type='submit']");
$target.bind('keydown', function (e) {
var key = e.which;
if (key == 13) {
e.preventDefault();
var nxtIdx = $target.index(this) + 1;
if ($target.eq(nxtIdx).attr("type") == "submit") {
$target.eq(nxtIdx).click();
} else {
$target.eq(nxtIdx).focus();
}
}
});
//End
});
</script>