常用JS验证（一）

﹏ヽ暗。殇╰゛Y 2022-04-16 03:09 190阅读 0赞

`1. js(文本框只允许输入数字)`

`<form>     <input type="text" name="money" onkeypress="checkNum(this)"> </form> <script language="javascript" type="text/javascript">     function checkNum()     {         if(window.event.keyCode > '9'.charCodeAt(0) ||            window.event.keyCode < '0'.charCodeAt(0))         {             window.event.returnValue=false;         }     } </script>`

`2.``js(ip地址输入)`

<html>

<head>  
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">  
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">  
<meta name="ProgId" content="FrontPage.Editor.Document">  
<style>  
.a3\{width:30;border:0;text-align:center\}  
</style>  
<script>  
function mask(obj)\{  
obj.value=obj.value.replace(/\[^\\d\]/g,'')  
key1=event.keyCode  
if (key1==37 || key1==39)  
\{ obj.blur();  
nextip=parseInt(obj.name.substr(2,1))  
nextip=key1==37?nextip-1:nextip+1;  
nextip=nextip>=5?1:nextip  
nextip=nextip<=0?4:nextip  
eval("ip"+nextip+".focus()")  
\}  
if(obj.value.length>=3)  
if(parseInt(obj.value)>=256 || parseInt(obj.value)<=0)  
\{  
alert(parseInt(obj.value)+"IP地址错误！")  
obj.value=""  
obj.focus()  
return false;  
\}  
else  
\{ obj.blur();  
nextip=parseInt(obj.name.substr(2,1))+1  
nextip=nextip>=5?1:nextip  
nextip=nextip<=0?4:nextip  
eval("ip"+nextip+".focus()")  
\}  
\}  
function mask\_c(obj)  
\{  
clipboardData.setData('text',clipboardData.getData('text').replace(/\[^\\d\]/g,''))  
\}

</script>  
<title>IP地址输入</title>

</head>  
<body>IP地址输入  
<div style="border-width:1;border-color:balck;border-style:solid;width:165;font-size:9pt">  
<input type=text name=ip1 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask\_c()>.  
<input type=text name=ip2 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask\_c()>.  
<input type=text name=ip3 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask\_c()>.  
<input type=text name=ip4 maxlength=3 class=a3 οnkeyup="mask(this)" onbeforepaste=mask\_c()>  
</div>  
</body>

</html>