ATM样式的小数位 [英] ATM style decimal places

问题描述

我正在努力获取旧代码从2003年开始工作.我正在尝试复制ATM样式的十进制文本框.这段代码声称对某人有用，但是我在实现它时遇到了麻烦.

I'm working on getting an old piece of code working, from 2003. I'm trying to replicate an ATM style decimal textbox. This code claims to have worked for someone, but I am having trouble implementing it.

也许有人有更好的方法来实现这一目标?也许在jQuery中?

Maybe someone has a better way of achieving this? Maybe in jQuery?

推荐答案

这就是我要解决的方法: http ://jsfiddle.net/77bMx/86/

This is how I would solve it: http://jsfiddle.net/77bMx/86/

• 处理数字键盘输入和标准数字键
• 使用退格键
• 如果您设法以某种方式产生非法输入(例如，退格过多)，将恢复为0.00

基本思想是截获对框的任何输入，确保其类型正确(数字或退格键)，然后将其添加到后备存储字符串(var input)，然后格式化该字符串正确显示.用户永远不会直接在文本框中输入任何内容，因为我在事件处理程序的末尾使用了return false.

The basic idea is to intercept any input to the box, make sure it's of the correct type (a number, or a backspace) and then add it to a backing storage string (var input), and then format that string to display correctly. The user never directly enters anything into the text box, since I use return false at the end of the event handler.

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