JavaScript实现文本框的限制输入实力分享

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<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,""))">
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<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,""))">
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<
input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">

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