Javascript Math Object Methods

The Code:

	document.write (Math.round(4.49) + "<br />");
	document.write (Math.round(4.51) + "<br />");
	document.write (Math.abs(-4.36) + "<br />");
	document.write (Math.sqrt(4.36) + "<br />");
	document.write (Math.sqrt(-4.36) + "<br />");
	document.write (Math.sqrt(Math.abs(-4.36)) + "<br />");