Home Web Front-end JS Tutorial JavaScript implements text box restriction input strength sharing

JavaScript implements text box restriction input strength sharing

May 11, 2018 am 11:15 AM
javascript js enter

为大家分享的JavaScript限制文本框的输入内容代码如下

<style type="text/css">
<!--
.STYLE1 {
 color: #0099FF;
 font-weight: bold;
 font-size: x-large;
}
-->
</style>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p align="center" class="STYLE1">亲,试试效果吧!</p>
<p align="center"><strong>请输入数字或字母</strong>:
 <input onkeyup="value=value.replace(/[W]/g,"") "onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^d]/g,""))">
</p>
<p align="center"><strong>请输入数字,只能输入数字哦</strong>:
 <input onkeyup="value=value.replace(/[^d]/g,"") "onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^d]/g,""))">
</p>
<p align="center"><strong>请输入汉字,只能输入汉字哦</strong>:
 <input onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,"")" onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^u4E00-u9FA5]/g,""))">
</p>
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运行效果图:

下面再给大家补充一些:

小数点后只能有最多两位(数字,中文都可输入),不能输入字母和运算符号:

<
input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">
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文本框只能输入数字代码(小数点也不能输入)

<
input onkeyup="this.value=this.value.replace(//D/g,"")" onafterpaste="this.value=this.value.replace(//D/g,"")">
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其实还可以限制其他内容,比如只能是字母,大家可以尝试一些其他的。

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