我建议将每个文本框的 maxlength 设置为 1,并在 val.length 和 maxlength 相同时切换到下一个文本框。
DEMO
$(".inputs").keyup(function () {
if (this.value.length == this.maxLength) {
$(this).next('.inputs').focus();
}
});
编辑:花了一些时间进行以下(未完全测试,但基本测试工作正常)
1. Allowing just numeric chars
2. Allow some control like del, backspace, e.t.c
3. Backspace on empty textbox will move to prev textbox
4. charLimit var to dynamically decide how many char you want to restrict.
代码:
$(function() {
var charLimit = 1;
$(".inputs").keydown(function(e) {
var keys = [8, 9, /*16, 17, 18,*/ 19, 20, 27, 33, 34, 35, 36, 37, 38, 39, 40, 45, 46, 144, 145];
if (e.which == 8 && this.value.length == 0) {
$(this).prev('.inputs').focus();
} else if ($.inArray(e.which, keys) >= 0) {
return true;
} else if (this.value.length >= charLimit) {
$(this).next('.inputs').focus();
return false;
} else if (e.shiftKey || e.which <= 48 || e.which >= 58) {
return false;
}
}).keyup (function () {
if (this.value.length >= charLimit) {
$(this).next('.inputs').focus();
return false;
}
});
});
DEMO