var cur_callout = 0;
var calloutTimer;

function showCallout() {
	if(calloutTimer) clearTimeout(calloutTimer);
	if(arguments[0]>0) cur_callout = arguments[0]-1;
	for(i=0;i<num_callouts;i++) {
		if(i==cur_callout) {
			$('#main_callout_'+i).fadeIn('slow');
		}
		else {
			$('#main_callout_'+i).fadeOut('slow');	
			
		}	
	}
	cur_callout++;
	if(cur_callout>=num_callouts) cur_callout = 0;
	if(num_callouts > 1) calloutTimer = setTimeout("showCallout()",6000);	
}

$(document).ready(function() {
   showCallout();
 });