function pollJSON() {
		xhr.open('GET',streamJSON+'?v='+cBust,true); //string query-style cache busting, forces non-cached new version of json to be opened each time
		xhr.send();
		cBust++;		
	}
//explicitly declares that json should always be processed as a json filetype
explicitly declares that json should always be processed as a json filetype
explicitly declares that json should always be processed as a json filetype
function pollJSON() {
		xhr.open('GET',streamJSON+'?v='+cBust,true); 
		xhr.send();
		cBust++;		
	}
function pollJSON ( ) { xhr . open ( 'GET' , streamJSON + '?v=' + cBust , true ) ; xhr . send ( ) ; cBust ++ ; }
explicitly declares that json should always be processed as a json filetype
explicitly declares that json should always be processed as a json filetype
//string query-style cache busting, forces non-cached new version of json to be opened each time