function resizePage()
{
	var offset1 = 0;
	var windowWidth = getWindowWidth();	

	var width1 = windowWidth - 800;
	width1= width1/2;
	
if (width1 >= 0)
	{
		document.getElementById("zajaczek").style.width = width1 + "px";
	}
}

function getWindowWidth()
{
	if (window.innerWidth)
	{
		return window.innerWidth;
	}
	if (document.body && document.body.clientWidth)
	{
		return document.body.clientWidth;
	}
  return 0;
}