Health suggestions in a multilevel conditional (javascript)

health.js

// multilevel conditional - switch/case statement
window.onload = initAll;

function initAll() {
	document.getElementById("Mental").onclick
		= health;
	document.getElementById("Physical").onclick
		= health;
	document.getElementById("Spiritual").onclick
		= health;
}
	
function health() {
	switch(this.id) {
		case "Mental":
			alert("Play Sudoku");
			break;
		case "Physical":
			alert("Do yoga");
			break;
		case "Spiritual":
			alert("Meditate");
			break;
		default:
	}		
}