function cornerbig() {
	document.getElementById('corner').style.width = "525px";
	document.getElementById('corner').style.height = "300px";
	document.getElementById('corner').style.marginTop = "0px";
	document.getElementById('corner').style.marginLeft = "435px";
	document.getElementById('smallcorner').style.display = "none";
	document.getElementById('bigcorner').style.display = "";
	}
	
function cornersmall() {
	document.getElementById('corner').style.width = "150px";
	document.getElementById('corner').style.height = "150px";
	document.getElementById('corner').style.marginTop = "150px";
	document.getElementById('corner').style.marginLeft = "810px";
	document.getElementById('bigcorner').style.display = "none";
	document.getElementById('smallcorner').style.display = "";
	}