介绍:利用JS实现在输入框内输入数字系统会自动在前面加上¥符号。
演示:
[Ctrl+A全选 提示:你可先修改部分代码,再按运行]
下面教你如何应用此特效:
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需要在<body
这里>加入的代码:
无
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以下代码加到<head>…</head>中
以下代码加到<body>…</body>中
<script>
function cc(s){
if(/[^0-9\.]/.test(s)) return "invalid value";
s=s.replace(/^(\d*)$/,"$1.");
s=(s+"00").replace(/(\d*\.\d\d)\d*/,"$1");
s=s.replace(".",",");
var re=/(\d)(\d{3},)/;
while(re.test(s))
s=s.replace(re,"$1,$2");
s=s.replace(/,(\d\d)$/,".$1");
return "¥" + s.replace(/^\./,"0.")
}
</script>
<input onchange="this.value=cc(this.value)">