function verify_link() {
	x = document.getElementById("sudoku_shack_link");
	if (!x) return false;
	if (x.href != 'http://www.sudokushack.com/') return false;
	if (x.innerHTML != 'Sudoku Shack') return false;
	return true;
}
if (verify_link()) {
	document.write("");
	document.write("<iframe id='sudoku_to_go' width=368 height=407 frameborder='0' scrolling='no' marginwidth='0' hspace='0' vspace='0' src='http://www.sudokushack.com/sudoku-to-go/'></iframe>");
	document.write("");
} else {
	document.write("Get correct Sudoku-to-go source at <a href='http://www.sudokushack.com/'>Sudoku Shack</a>");
}