/*
 * Author: Rob Reid
 * CreateDate: 20-Mar-09
 * Description: Little helper function to return details about IE 8 and its various compatibility settings either use as it is
 * or incorporate into a browser object. Remember browser sniffing is not the best way to detect user-settings as spoofing is
 * very common so use with caution.
*/
function IEVersion(){
	var _n=navigator,_w=window,_d=document;
	var version="NA";
	var na=_n.userAgent;
	var ieDocMode="NA";
	var ie8BrowserMode="NA";
	// Look for msie and make sure its not opera in disguise
	if(/msie/i.test(na) && (!_w.opera)){
		// also check for spoofers by checking known IE objects
		if(_w.attachEvent && _w.ActiveXObject){		
			// Get version displayed in UA although if its IE 8 running in 7 or compat mode it will appear as 7
			version = (na.match( /.+ie\s([\d.]+)/i ) || [])[1];
			// Its IE 8 pretending to be IE 7 or in compat mode		
			if(parseInt(version)==7){				
				// documentMode is only supported in IE 8 so we know if its here its really IE 8
				if(_d.documentMode){
					version = 8; //reset? change if you need to
					// IE in Compat mode will mention Trident in the useragent
					if(/trident\/\d/i.test(na)){
						ie8BrowserMode = "Compat Mode";
					// if it doesn't then its running in IE 7 mode
					}else{
						ie8BrowserMode = "IE 7 Mode";
					}
				}
			}else if(parseInt(version)==8){
				// IE 8 will always have documentMode available
				if(_d.documentMode){ ie8BrowserMode = "IE 8 Mode";}
			}
			// If we are in IE 8 (any mode) or previous versions of IE we check for the documentMode or compatMode for pre 8 versions			
			ieDocMode = (_d.documentMode) ? _d.documentMode : (_d.compatMode && _d.compatMode=="CSS1Compat") ? 7 : 5;//default to quirks mode IE5				   			
		}
	}
				 
	return {
		"UserAgent" : na,
		"Version" : version,
		"BrowserMode" : ie8BrowserMode,
		"DocMode": ieDocMode
	}			
}


function showBrowserErrors(browser)
{
	if ( browser.Version == 'NA' )
	{
		return false;
	}

/*
	if ( browser.BrowserMode == 'Compat Mode' )
	{
		getObj('browserError').innerHTML = '<h1>Browser Notice:</h1><p>This website does not work with compatibility mode.<br/>Please switch it off and refresh to view the site correctly.</p><p><img src="images/misc/compatmode.gif" /></p>';
		showError();
	}
*/
	
	if ( parseInt(browser.Version) < 5 )
	{
		getObj('browserError').innerHTML = '<h1>Browser Notice:</h1><p>This website is only compatible with IE5.5+ (best viewed in IE7+) or any other browser.<br/>Please upgrade to view this site correctly.</p>';
		showError();
	}
}

function showError()
{
	getObj('browserError').innerHTML += '<p>We apologise for any inconvenience this may of caused.</p>';
	getObj('browserError').style.display = '';
	getObj('dullbg').style.display = '';
}