JS验证input输入框（字母，数字，符号，中文）的代码实例分享

<input type="text" onkeyup="value=value.replace(/[^a-zA-Z]/g,'')">

<input type="text" onkeyup="value=value.replace(/[^\a-\z\A-\Z]/g,'')"
onkeydown="fncKeyStop(event)" onpaste="return false"
oncontextmenu="return false" />

<input onkeyup="this.value=this.value.replace(/\D/g,'')"
onafterpaste="this.value=this.value.replace(/\D/g,'')">

<input name="price" type="text"
onkeyup="value=value.replace(/[^\d\.]/g,'')">

<input name="price" type="text"
onkeyup="value=value.replace(/[^\d\._]/g,'')">

<input onkeyup="value=value.replace(/[\W]/g,'') "
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))">

<input onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))">

<input type="text" style="ime-mode: disabled">

<input type="text"
onkeyup="value=value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\@\.]/g,'')">

<input 
onblur
="
if
(this.value.replace(/^ +| +$/g,'')=='')alert('不能为空!')">