<input id="item" style="IME-MODE: disabled; WIDTH: 15px; HEIGHT: 10px" onkeyup="this.value=this.value.replace(/\D/g,‘‘)" onafterpaste="this.value=this.value.replace(/\D/g,‘‘)" maxlength="5" size="14" name="amount" type="text" value="" />
原文：http://my.oschina.net/bloghu/blog/318758