var hourCheckID = 0;

function checkHour() {
	if(hourCheckID) {
		clearTimeout(hourCheckID);
  	hourCheckID  = 0;
	}
	var tDate = new Date();
	xajax_cssSwap(tDate.getHours());
	hourCheckID = setTimeout("checkHour()", 60000);
}

function startCSSswapper() {
	hourCheckID = setTimeout("checkHour()", 1000);
}

function stopCSSswapper() {
	if(hourCheckID) {
	  clearTimeout(hourCheckID);
  	hourCheckID  = 0;
	}
}