var nbrLandscapeImages = 21;
var nbrPortraitImages = 28;

// Specify the first and last part of the image tag.

var portraitOpen = '<img class="sz160x120" src="images/P';
var landScapeOpen = '<img class="sz160x120" src="images/L';
var close = '.jpg" alt="Children">';

function printPortraitImage() 
{
	var r = Math.ceil(Math.random() * nbrPortraitImages);
	document.write(portraitOpen + r + close);
}

function printLandScapeImage() 
{
	var r = Math.ceil(Math.random() * nbrLandscapeImages);
	document.write(landScapeOpen + r + close);
}