Forms >>> Validation Ip.


		<script 
		language="javascript"
		type="text/javascript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		function 
		verifyIP (IPvalue)
		{

		errorString 
		=
		"";

		theName 
		=
		"IPaddress";

		

		var 
		ipPattern =
		/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;

		var 
		ipArray = 
		IPvalue.match(ipPattern);

		

		if
		(IPvalue
		==
		"0.0.0.0")

		errorString 
		= 
		errorString + 
		theName +
		': '+IPvalue+' 
		is a special IP address and cannot be used here.';

		else
		if
		(IPvalue
		==
		"255.255.255.255")

		errorString 
		= 
		errorString + 
		theName +
		': '+IPvalue+' 
		is a special IP address and cannot be used here.';

		if
		(ipArray
		==
		null)

		errorString 
		= 
		errorString + 
		theName +
		': '+IPvalue+' 
		is not a valid IP address.';

		else
		{

		for
		(i
		=
		0; 
		i <
		4; 
		i++)
		{

		thisSegment 
		= 
		ipArray[i];

		if
		(thisSegment
		>
		255)
		{

		errorString 
		= 
		errorString + 
		theName +
		': '+IPvalue+' 
		is not a valid IP address.';

		i 
		=
		4;

		}

		if
		((i
		==
		0)
		&&
		(thisSegment
		>
		255))
		{

		errorString 
		= 
		errorString + 
		theName +
		': '+IPvalue+' 
		is a special IP address and cannot be used here.';

		i 
		=
		4;

		      
		}

		   
		}

		}

		extensionLength 
		=
		3;

		if
		(errorString
		==
		"")

		alert
		("That 
		is a valid IP address.");

		else

		alert
		(errorString);

		}

		//  End -->

		</script>

		<form>

		IP Address:

		<input
		size=15
		name="IPvalue">

		<input 
		type="submit"
		value="Verify"
		onClick="verifyIP(IPvalue.value)";>

		</form>