How to bypass proxy server in IE for local domain or IP address range ?

function FindProxyForURL(url, host) {
	var  myProxy;
	var direct;
 
	myProxy = "PROXY myproxy.mycompany.com:8080";
	direct = "DIRECT";
 
	if (isPlainHostName(host))
               // local hosts w/o a given domain (no dot in the name string)
		return direct;
	else if (shExpMatch(host, "127.0.0.1"))
               // localhost never should use proxy
		return direct;
	else if (shExpMatch(host, "192.168.*"))
                // private class-c nets are not routed outside the company
		return direct;
	else if (shExpMatch(host, "10.*"))
               // private class-a net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.16.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.17.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.18.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.19.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.20.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.21.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.22.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.23.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.24.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.25.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.26.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.27.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.28.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.29.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.30.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (shExpMatch(host, "172.31.*.*")) // repeat 'til 31.*
               // private class-b net is not routed outside the company
		return direct;
	else if (localHostOrDomainIs(host, "specific.customer.de"))
               // specific.customer.de may be connected directly via VPN
		return direct;
	else if (dnsDomainIs(host, "mycompany.de"))
               // all hosts in local domain don't use proxy
		return direct;
	else
		//default to PROXY;
		return myProxy ;
}
                                              

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