javascript:控制输入框只能输入数字

来源：互联网发布：mac上app怎么卸载编辑：程序博客网时间：2024/05/17 12:56

在input的标签中加入以下代码:
onkeyup="this.value=value.replace(/[^\d]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"

<script language="javascript">
//更换验证码
function getImageCode()
{
var randomnum = Math.random();
var getimagecode = document.getElementById("chkcode");
getimagecode.src = "/vbao/indexCheckImage.do?" + randomnum;
}
</script>
<input name="authcode" alt=验证码
onkeyup="this.value=value.replace(/[^\d]/g,'')"
onbeforepaste=
"clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
style="height: 25px;padding: 5px;" maxlength="8"
id="authcodeInput" value="" type="text" size="4" style="width: 60px;"/>
<img id="chkcode" src="/vbao/indexCheckImage.do"
width="50" height="25" style="margin: -5px;"/>
<a class="font1" href="javascript:getImageCode()">看不清</a>

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