GEOIP  = function () {
    
    GEOIP.prototype.ajax = function(url,action) {    
        try {
    		xmlhttp = window.XMLHttpRequest?new XMLHttpRequest(): new ActiveXObject("Microsoft.XMLHTTP"); 
    	} catch (e) {} 		
    	xmlhttp.onreadystatechange = action; 		
    	xmlhttp.open("GET", url, true); 		
    	xmlhttp.send(null);          
    }    
    
 
    GEOIP.prototype.changeState = function(){
        if ((xmlhttp.readyState == 4) && (xmlhttp.status == 200)) {
            //if user is not from uk change links
            if(xmlhttp.responseText == 1){            
                var amazonLinks = getElementsByClassName('amazonUK');
                for(var i=0, il=amazonLinks.length; i<il; i+=1){
                    amazonLinks[i].style.display = 'none';
                }
            
                var amazonLinks = getElementsByClassName('amazonCOM');
                for(var i=0, il=amazonLinks.length; i<il; i+=1){
                    amazonLinks[i].style.display = 'inline';
                }
            }
        }
    }
    
    //call geoip.php if user is not from uk try to find amazon.uk links hide it and show amazon.com links
    GEOIP.prototype.init = function(){
        geoip.ajax('http://www.pokerology.com/-poker-school/seven-card-stud/geoip.php', geoip.changeState);        
    }

}

var geoip = new GEOIP;

// function to add an event listener
function addEvent(o,e,f) {
  if (o.addEventListener) {
    o.addEventListener(e,f,false);
    return true;
  }
  else if (o.attachEvent) {
    return o.attachEvent("on"+e,f);
  }
  else {
    return false;
  }
}
addEvent(window,"load",geoip.init);

document.write('<style>.amazonCOM{display:none}</style>');

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/	
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};