// JavaScript Document

function sizeTbl(h, action)
{
	var action1=document.getElementById(action);
	action1.style.display=h;
}

function twentyyears()
{
	alert("Sorry, please try again...")
}

function thirtyyears()
{
	alert("Sorry, please try again...")
}

function fortyyears()
{
	alert("Well done, you got it right!")
}

function barnowlstrue()
{
	alert("Yes, it is true! Barn owls can hunt successfully in pitch darkness, using only their excellent hearing to find their prey.")
}

function barnowlsfalse()
{
	alert("Sorry, it is true! Barn owls can hunt successfully in pitch darkness, using only their excellent hearing to find their prey.")
}

function verrauxsowlstrue()
{
	alert("Yes, it is true!")
}

function verrauxsowlfalse()
{
	alert("Sorry, it is true!")
}

function biggerbarnowl()
{
	alert("Sorry, please try again...")
}

function biggergiantowl()
{
	alert("Sorry, please try again...")
}

function biggerpelsowl()
{
	alert("Yes, Pel's Fishing Owl is the biggest, at 55cm high. A Barn Owl is 30cm high, and a Verraux's (Giant) Eagle-Owl is 50cm high.")
}

function nocturnal()
{
	alert("Well done, you got it right! Nocturnal animals are active at night and diurnal ones are active during the day.")
}

function diurnal()
{
	alert("Sorry! Nocturnal animals are active at night and diurnal ones are active during the day.")
}