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IP 地址验证

F#CC++C# 
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<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,''))  
}

function ValrIP(){
var ip = document.getElementById("idvalider").value;
  //document.getElementById("idvalider").style.borderColor="red";
  alert(checkIp(ip));

}
function checkIp(ip){
   var ipPattern = new RegExp("^(([1-9][0-9]?)|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))\\.((0)|([1-9][0-9]?)|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))\\.((0)|([1-9][0-9]?)|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))\\.((0)|([1-9][0-9]?)|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))$","g");

       var ip6Pattern=new RegExp("^(^::$)|(^([\\d|a-fA-F]{1,4}:){7}([\\d|a-fA-F]{1,4})$)|(^(::(([\\d|a-fA-F]{1,4}):){0,5}([\\d|a-fA-F]{1,4}))$)|(^(([\\d|a-fA-F]{1,4})(:|::)){0,6}([\\d|a-fA-F]{1,4})$)$","g");

       if(ipPattern.test(ip)){
       return true;
      }
      if (ip6Pattern.test(ip)){
          var pos=ip.indexOf("::");
               if(pos>-1){
                   pos=ip.indexOf("::",pos+2);
                   if (pos>-1) return false;
                 }
             return true;
        }
        return false;
     }
</script>  
<title>IP地址输入</title>  
</head>  
<body>IP地址输入  
<h1>方法一</h1>
<div style="border-width:2;border-color:balck;width:40;font-size:9pt">  
<input type=text size="5" name=ip1 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.  
<input type=text size="5" name=ip2 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.  
<input type=text size="5" name=ip3 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>.  
<input type=text size="5" name=ip4 maxlength=3 class=a3 onkeyup="mask(this)" onbeforepaste=mask_c()>

</div>


<h1>方法二</h1>
<table border="1">
   <input id="idvalider" type="text" />
   <input type="button" onclick="ValrIP()" value="提交" />
</table>
</body>  
</html> 
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