function configureCssClasses()
{
	if (navigator.appName == 'Microsoft Internet Explorer')
	{
		var mainContentDiv = document.getElementById('mainContent');
		mainContentDiv.className = mainContentDiv.className + '_IE';
	}
}

// returns an XMLHTTPRequest object
function getXMLHTTPRequestObject()
{
	var xmlHttp;
	// Firefox, Opera 8.0+, Safari
	try { xmlHttp = new XMLHttpRequest();	}
	// Internet Explorer
	catch (e) 
	{
		try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } 
		catch (e)
		{
			try { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); }
			catch (e) { alert("Your browser does not support AJAX!"); return false; }
		}
	}
	return xmlHttp;
}