Collection
Collection
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
</head>
<style>
.col-md-6{padding-left: 0;}
.col-md-12 .col-md-6 input{width: 100%;}
</style>
<body>
<div class="container">
<div class="row">
<form class="col-md-8 col-lg-offset-2">
<h5>输入框类型</h5>
<label class="control-label">1.文本框只能输入数字代码(小数点也不能输入)</label>
<input class="form-control" onKeyUp="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">
<br>
<label class="control-label">2.只能输入数字,能输小数点.</label>
<div class="col-md-12 form-inline" style="padding: 0;">
<div class="col-md-6">
<input class="form-control" onKeyUp="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')">
</div>
<div class="col-md-6">
<input class="form-control" name="txt1" onChange="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}">
</div>
</div>
<br>
<label class="control-label">3.数字和小数点方法二</label>
<input class="form-control" type="text" t_value="" o_value="" onKeyPress="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))this.o_value=this.value" onKeyUp="if(!this.value.match(/^[\+\-]?\d*?\.?\d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?)?$/))this.o_value=this.value" onBlur="if(!this.value.match(/^(?:[\+\-]?\d+(?:\.\d+)?|\.\d*?)?$/))this.value=this.o_value;else{if(this.value.match(/^\.\d+$/))this.value=0+this.value;if(this.value.match(/^\.$/))this.value=0;this.o_value=this.value}"> <br>
<label class="control-label">4.只能输入字母和汉字</label>
<input class="form-control" onKeyUp="value=value.replace(/[\d]/g,'') " onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[\d]/g,''))" maxlength="10" name="Numbers"> <br>
<label class="control-label">5.只能输入英文字母和数字,不能输入中文</label>
<input class="form-control" onKeyUp="value=value.replace(/[^\w\.\/]/ig,'')"> <br>
<label class="control-label">6.只能输入数字和英文</label
><font color="Red">chun</font>
<input class="form-control" onKeyUp="value=value.replace(/[^\d|chun]/g,'')"> <br>
<label class="control-label">7.小数点后只能有最多两位(数字,中文都可输入),不能输入字母和运算符号:</label>
<input class="form-control" onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || /\.\d\d$/.test(value))event.returnValue=false"> <br>
<label class="control-label">8.小数点后只能有最多两位(数字,字母,中文都可输入),可以输入运算符号:</label>
<input class="form-control" onKeyUp="this.value=this.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3')"><br />
<label class="control-label">9.只能是数字和小数点和加减乘際 </label>
<input class="form-control" type="text"onkeypress="return event.keyCode>=4&&event.keyCode <=57 " />
</form>
</div>
</div>
<div style="text-align:center;">
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例
