//attach automatically at startup
function addOnloadFunction(funcCall)
{
	if (window.addEventListener) 
	{ // Non-IE browsers
		window.addEventListener('load', funcCall, false);        
	} 
	else if (window.attachEvent) 
	{ // IE 6+
		window.attachEvent('on' + 'load', funcCall);
	} 
	else 
	{ // Older browsers 
		var currentEventHandler = window['on' + 'load'];
		if (currentEventHandler == null) 
		{
			window['on' + 'load'] = funcCall;
		} 
		else 
		{
	    window['on' + 'load'] = function(e) { currentEventHandler(e); funcCall(e); }
		}
	}
}