从右到左蒙版输入jQuery [英] Right to left mask input with jQuery

问题描述

我在jQuery中输入以下掩码:

I have the following mask input in jQuery:

  $("#id_Account").mask("9999",{placeholder:"0"})

此文本框的当前行为是使用零作为占位符以键入我只需要的数字，然后在键入enter后用0填充其余部分. 但是我想在输入后在左侧而不是在右侧用0填充.

The current behaviour of this textbox is to have zeros as placeholder to type the numbers that i just need and then fill the rest with 0's after typing enter. But I would like to fill the with 0's at left side, not at right side after typing.

例如，我在texbox中有"0000"(或只是空白)，然后键入"12"，然后文本框显示此值:"1200"，但我真正想要的是此值:"0012" "

For example, I have in the texbox "0000" (or just blank), then I type "12", then the textbox is showing this value: "1200", but that i really want is this value: "0012"

推荐答案

我通过以下方式实现了自己:

I implemented myself with something like this:

<input name="myaccount1" type="text" style="text-align:right" onchange="mask_account(this)">

这是功能:

function mask_account(field_account){
            var qty_chars = field_account.value.length;
            var zeros = ''
            for (i=0; i < 4 - qty_chars; i++ ){
                zeros= zeros + '0';
            }

            var new_value = zeros + field_account.value;
            field_account.value = new_value;
        }

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