js用正则表达式控制价格输入

<!--
胡开明
用正则表达式控制价格输入
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <title>用正则表达式控制价格输入</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <script type="text/javascript">
            var record={
                num:""
            }
            var checkDecimal=function(n){
                var decimalReg=/^\d{0,8}\.{0,1}(\d{1,2})?$/;//var decimalReg=/^[-\+]?\d{0,8}\.{0,1}(\d{1,2})?$/;
                if(n.value!=""&&decimalReg.test(n.value)){
                    record.num=n.value;
                }else{
                    if(n.value!=""){
                        n.value=record.num;
                    }
                }
            }
        </script>
    </head>
    <body>
        <h3>实用技巧：用正则表达式控制价格输入</h3>
        销售价<input maxlength="10" size="18" type="text" name="price" value="" onkeyup='checkDecimal(this)'/>
    </body>
</html>
url:http://greatverve.cnblogs.com/archive/2011/11/28/js-reg.html
posted @ 2011-11-28 10:11  大气象  阅读(5404)  评论(7)  编辑  收藏  举报
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