// this function is used to allow running multiple functions on document.onload
// instead of the last one replacing all the previous
function addLoadEvent(func)
{
	var oldOnLoad = window.onload;
	if( typeof window.onload != 'function' )
	{
		window.onload = func;
	}
	else
	{
		window.onload = function()
		{
			oldOnLoad();
			func();
		}
	}
}