function GetMinWidth()  {
	var i=Math.ceil((window.screen.width - 160)*0.55) - 6;
	return i;}
function LoadHelp(helpFileName)  {
       if(window.parent != window)
	   {
	   	if (window.parent.topFrame.hl != helpFileName)
	          window.parent.helpFrame.location.href = helpFileName;
	   	window.parent.topFrame.hl = helpFileName;
	   }
       return true;   }
function resize(obj)  {
var minWidth = GetMinWidth();
if (window.document.body.offsetWidth > minWidth)
  {obj.autoWidth.style.width = "100%";}
 else
  {obj.autoWidth.style.width = minWidth;}
       return true;   }
function resizeHelp(obj)  {    
if (window.document.body.offsetWidth > 290)
  {obj.autoWidth.style.width = "100%";}
 else
  {obj.autoWidth.style.width = 290;}
       return true;   }
function LoadNext(FileName)  {
if(window.parent != window)
	window.parent.mainFrame.location.href = FileName;
return true;   }
function ipverify(ip_string){
	var c;
	var n = 0;
	var ch = ".0123456789";
	if (ip_string.length < 7 || ip_string.length > 15)
		return false;
	for (var i = 0; i < ip_string.length; i++){
		c = ip_string.charAt(i);
		if (ch.indexOf(c) == -1)
			return false;
		else{
			if (c == '.'){
				if(ip_string.charAt(i+1) != '.')
					n++;
				else
					return false;
			}		
		}
	}
	if (n != 3)
		return false;
	if (ip_string.indexOf('.') == 0 || ip_string.lastIndexOf('.') == (ip_string.length - 1))
		return false; 
		
	szarray = [0,0,0,0];
	var remain;
	var i;
	for(i = 0; i < 3; i++){
		var n = ip_string.indexOf('.');
		szarray[i] = ip_string.substring(0,n);
		remain = ip_string.substring(n+1);
		ip_string = remain;
	}
	szarray[3] = remain;
	for(i = 0; i < 4; i++){
		if (szarray[i] < 0 || szarray[i] > 255){
			return false;
		}
	}		
	return true;	
}
function is_ipaddr(ip_string){
	if(ip_string.length == 0){
		alert("Please input IP address!");
		return false;
	}
	if (!ipverify(ip_string)){
		alert("Bad IP address, please input another one!");
		return false;
	}	
	return true;
}
function is_maskaddr(mask_string){
	if(mask_string.length == 0){
		alert("Please input Subnet Mask (for example: 255.255.255.0)!");
		return false;
	}
	if (!ipverify(mask_string)){
		alert("Bad Subnet Mask, please input another one (for example: 255.255.255.0)!");
		return false;
	}	
	return true;
}
function is_gatewayaddr(gateway_string){
	if(gateway_string.length == 0){
		alert("Please input Gateway!");
		return false;
	}
	if (!ipverify(gateway_string)){
		alert("Bad Gateway, please input another one!");
		return false;
	}	
	return true;
}
function is_dnsaddr(dns_string){
	if(dns_string.length == 0){
		alert("Please input DNS server address (for example 202.96.134.133)!");
		return false;
	}
	if (!ipverify(dns_string)){
		alert("Bad DNS server address, please input another one (for example 202.96.134.133)!");
		return false;
	}	
	return true;
}
function macverify(mac_string){
	var c;
	var n = 0;
	var ch = "-0123456789ABCDEFabcdef";
	if (mac_string.length != 17)
			return false;
	for (var i = 0; i < mac_string.length; i++){
		c = mac_string.charAt(i);
		if (ch.indexOf(c) == -1)
			return false;
		else{
			if (c == '-')
				n++;		
		}
	}
	if (n != 5)
			return false;
	for(var i = 2; i < 17; i += 3){
		if (mac_string.charAt(i) != '-')
			return false;
	}
	return true;	
}
function is_macaddr(mac_string){
	if(mac_string.length == 0){
		alert("Please input MAC address!");
		return false;
	}
	if (!macverify(mac_string)){
		alert("Bad MAC address, please input another one!");
		return false;
	}
	return true;	
}
function is_number(num_string,nMin,nMax){
	var c;
	var ch = "0123456789";
	for (var i = 0; i < num_string.length; i++){
		c = num_string.charAt(i);
		if (ch.indexOf(c) == -1)
			return false;
	}
	if(parseInt(num_string) < nMin || parseInt(num_string) > nMax)
		return false;
	return true;
}
function charCompare(szname,en_limit,cn_limit){
	var c;
	var ch = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.><,[]{}?/+=|\\'\":;~!#$%()` & ";
	if(szname.length > en_limit)
		return false;
	for (var i = 0; i < szname.length; i++){
		c = szname.charAt(i);
		if (ch.indexOf(c) == -1){
			if(szname.length > cn_limit)
				return false;
		}
	}
	return true;
}		
function is_hostname(name_string){
	var EN_LIMIT = 30;	
	var CN_LIMIT = 15;
	if(!charCompare(name_string,EN_LIMIT,CN_LIMIT)){
		alert("You can input up to 30 characters, please input again!");
		return false;
	}
	else
		return true;
}
function lastipverify(lastip,nMin,nMax){
	var c;
	var n = 0;
	var ch = "0123456789";
	if(lastip.length = 0)
		return false;
	for (var i = 0; i < lastip.length; i++){
		c = lastip.charAt(i);
		if (ch.indexOf(c) == -1)
			return false;
	}
	if (parseInt(lastip) < nMin || parseInt(lastip) > nMax)
		return false; 		
	return true;	
}
function is_lastip(lastip_string,nMin,nMax){
	if(lastip_string.length == 0){
		alert("Please input IP address (1-254)!");
		return false;
	}
	if (!lastipverify(lastip_string,nMin,nMax)){
		alert("Bad IP address, please input another one (1-254)!");
		return false;
	}	
	return true;
}
function is_domain(domain_string){
	var c;
	var ch = "-.ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
	for (var i = 0; i < domain_string.length; i++){
		c = domain_string.charAt(i);
		if (ch.indexOf(c) == -1){
			alert("The inputted value contain illegal character, please input another one!");
			return false;
		}
	}		
		return true;
}
function portverify(port_string){
	var c;
	var ch = "0123456789";
	if(port_string.length == 0)
		return false;
	for (var i = 0; i < port_string.length; i++){
		c = port_string.charAt(i);
		if (ch.indexOf(c) == -1)
			return false;
	}
	if (parseInt(port_string) <= 0 || parseInt(port_string) >=65535)
		return false;
	return true;
}
function is_port(port_string){
	if(port_string.length == 0){
		alert("Please input port number (1-65534)!");
		return false;
	}
	if (!portverify(port_string)){
		alert("Bad port number, please input another number (1-65534)!");
		return false;
	}	
	return true;
}