价格录入input

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<!doctype html><html><head>    <meta charset="utf-8">    <title>价格录入限定</title>    <script type="text/javascript">    /**     * 实时动态强制更改用户录入     *      **/    function amount(th,event) {        var event = event || window.event;        var code = event.keyCode;        if(navigator.userAgent.indexOf("Firefox")>-1){            code = event.which;        }        if(code == 37 || code ==39) return;        var regStrs = [            ['^0(\\d+)$', '$1'], //禁止录入整数部分两位以上，但首位为0            ['[^\\d\\.]+$', ''], //禁止录入任何非数字和点            ['\\.(\\d?)\\.+', '.$1'], //禁止录入两个以上的点            ['^(\\d+\\.\\d{2}).+', '$1'], //禁止录入小数点后两位以上            ['^(\\.\\d+)','$1']//禁止输入情况下小数点出现在首位        ];        for (i = 0; i < regStrs.length; i++) {            var reg = new RegExp(regStrs[i][0]);            th.value = th.value.replace(reg, regStrs[i][1]);        }    }    /**     * 录入完成后，输入模式失去焦点后对录入进行判断并强制更改，并对小数点进行0补全     * s     **/    function overFormat(th) {        var v = th.value;        if (v === '') {            v = '0.00';        } else if (v === '0') {            v = '0.00';        } else if (v === '0.') {            v = '0.00';        } else if (/^0+\d+\.?\d*.*$/.test(v)) {            v = v.replace(/^0+(\d+\.?\d*).*$/, '$1');            v = inp.getRightPriceFormat(v).val;        } else if (/^0\.\d$/.test(v)) {            v = v + '0';        } else if (!/^\d+\.\d{2}$/.test(v)) {            if (/^\d+\.\d{2}.+/.test(v)) {                v = v.replace(/^(\d+\.\d{2}).*$/, '$1');            } else if (/^\d+$/.test(v)) {                v = v + '.00';            } else if (/^\d+\.$/.test(v)) {                v = v + '00';            } else if (/^\d+\.\d$/.test(v)) {                v = v + '0';            } else if (/^[^\d]+\d+\.?\d*$/.test(v)) {                v = v.replace(/^[^\d]+(\d+\.?\d*)$/, '$1');            } else if (/\d+/.test(v)) {                v = v.replace(/^[^\d]*(\d+\.?\d*).*$/, '$1');                ty = false;            } else if (/^0+\d+\.?\d*$/.test(v)) {                v = v.replace(/^0+(\d+\.?\d*)$/, '$1');                ty = false;            } else {                v = '0.00';            }        }        th.value = v;    }    </script></head><body>    <input type="text" name="city" class="money" value="" onKeyUp="amount(this)" onBlur="overFormat(this)" /></body></html>
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