在表单字段中自动前进 [英] Auto-advance in form fields

问题描述

我有一个简单的脚本，可以在输入一个字符后将光标自动前进到html表单中的下一个字段...因此非常有用.这是简单的代码:

I have a simple script that auto-advances the cursor to the next field in my html form after one character is entered...and it works great for that. This is the simple code:

function autotab(current,to)
{
if (current.getAttribute && current.value.length==current.getAttribute("maxlength")) 
{   
        to.focus()          
    }
}

然后我当然使用onkeyup来推进它，就像这样:

Then of course I use the onkeyup to advance it, like this:

<input onkeyup="autotab(this, document.jumble.w1b)" type="text">

同样，效果很好.但是，当我执行Shift + Tab键返回一个框时，它会在输入任何内容之前自动前进.

Again, that works great. However, when I do Shift+Tab to go one box back, it auto-advances before I can type anything.

有人有一个代码示例，说明如何使Shift + Tab起作用吗?我尝试过尝试使用键码来检测班次和制表符的不同方法，但它似乎不起作用.

Does anyone have a code example of how to make Shift+Tab work? I have tried different variations of trying to use the keycodes to detect shift and tab, but it doesn't seem to work.

任何帮助将不胜感激！

推荐答案

如果shift + tab

将事件添加为自动选项卡中的第一个参数:<input onkeyup="autotab(event, this, document.jumble.w1b)" type="text">

Add event as first parameter in autotab: <input onkeyup="autotab(event, this, document.jumble.w1b)" type="text">

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