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html中ip验证代码

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作者 正文
   发表时间:2007-11-01  
<html>
<head>
<meta http-equiv="Content-Type" content="textml; 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 onkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip2 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip3 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.
<input type=text name=ip4 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>
</div>
</body>
</html>
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