/*	Function to make clouds move.
	Negative numbers move right to left; positive numbers move left to right. */
function moveClouds(){
	cloudPosition--;
	cloudPosition = (cloudPosition<-600) ? 0:cloudPosition;
	if (document.getElementById){
		bodyObj = document.getElementById("clouds")
		bodyObj.style.left = cloudPosition + "px";
		return true;
	} else {
		return false;
	}
}