function checkscreen() 
{
	var h = screen.height;
	if (h < 801)
	{
		document.getElementById('mediumcontent').style.height = '220px';
	}
	if (h < 1024)
	{
		document.getElementById('mediumcontent').style.height = '280px';
	}
	if (h > 1200)
	{
		document.getElementById('mediumcontent').style.height = '500px';
	}
}