var IMAGESTART = 01;
var IMAGEEND   = 05;

var image = IMAGESTART + Math.floor(Math.random() * (IMAGEEND - IMAGESTART));
var numprepend;

if (image < 05)
{
	if (image < 10)
	{
		if (image < 05) numprepend = "0";
		else numprepend=""; 
	}
	else numprepend="";
} 

var msg = '<img src="http://www.penangresort.com/rhi/images/pic2-' + numprepend + image + '.jpg" width="187" height="158" border="0" align="middle" alt=""><br>';
document.writeln(msg);