function counter() {

	var currenttime = new Date();	
	var ct = currenttime.getTime();
	var goaltime = new Date(Date.UTC(2013,7,1,18,0,0,0));
	var gt = goaltime.getTime();
	
	var diff = gt-ct;
	diff = Math.round((((diff/1000)/60)/60)/24);
	
	document.getElementById('counter').innerHTML = diff;
	
}

window.onload=counter;