var subNavIFrameTop=23;
var subNavIFrameHeightOffset=17;

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{	// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 	// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}

function startList()
{
	//If the browser is internet explorer 6 or lower
	if (BrowserDetect.browser=="Explorer" && BrowserDetect.version<=6 && document.getElementById)
	{
		//Get the naviagation list
		navRoot = document.getElementById("nav");
		//Iterate over the navigation children
		for (i=0; i<navRoot.childNodes.length; i++)
		{
			node = navRoot.childNodes[i];
			//If this child is a list item
			if (node.nodeName=="LI")
			{
				//Set its mouse over and mouse out behaviour
				node.onmouseover=function()
				{
					this.className+=" over";
					//Need to place an iframe under the ul
					//so select boxes don't show through
					var uls=this.getElementsByTagName('ul');
					for(j=0; j<uls.length; j++)
					{
						ul=uls[j];
						if(ul.className=="sub-nav")
						{
							var iframe = document.createElement('iframe');
							iframe.src="blank.html";
							var iframeHeight=ul.offsetHeight-subNavIFrameHeightOffset;
							iframe.style.top=subNavIFrameTop+'px';
							iframe.style.height=iframeHeight+'px';
							iframe.style.width=ul.offsetWidth+'px';
							
							this.insertBefore(iframe, ul);
						}
					}
				}
				node.onmouseout=function()
				{
					//Ditch the iframe
					var iframes=this.getElementsByTagName('iframe');
					for(k=0;k<iframes.length;k++)
					{
						this.removeChild(iframes[k]);
					}
					//Change the class name
					this.className=this.className.replace(" over", "");
				}
			}
	  }
	}
}

window.onload=function() { startList(); externalLinks(); };

//this is the script for the tabs on the details page

     //var tabCount = 4;
        function setTab(ct, tabCount) {
            var i;
            for(i=1; i<=tabCount; i++) {
                var td = document.getElementById("tabdiv" + i);
				var tl = document.getElementById("tabli" + i);
                td.style.display = 'none';
				tl.className = '';
            }
            
            var std = document.getElementById("tabdiv" + ct);
			var sli = document.getElementById("tabli" + ct);
            std.style.display = 'block';
			sli.className = 'on';
        }