1.Input只能输入正整数
<html>
<head>
<title>只能输入正整数</title>
</head>
<body>
兑换数量:
<input type="text" ID="txtNumber" Width="50px"
onkeyup="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'')}else{this.value=this.value.replace(/D/g,'')}"
onafterpaste="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'0')}else{this.value=this.value.replace(/D/g,'')}" />
</body>
</html>