<!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> </p> <h3>实用技巧：用正则表达式控制价格输入</h3> <p> 销售价<input maxlength="10" size="18" type="text" name="price" value="" onkeyup='checkDecimal(this)'/> </body> </html> [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
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