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			function styleChange(prefix, title) {
			  var sheets = document.getElementsByTagName("link");
			  for (var i=0; i<sheets.length; i++)
				if (sheets[i].getAttribute("rel").indexOf("style") != -1) {
				  var sheetTitle = sheets[i].getAttribute("title");
				  if (sheetTitle && (sheetTitle.indexOf(prefix) == 0)) sheets[i].disabled = (sheetTitle != (prefix + title));
				  }
			  }
			
			function getCSS() {
			  var now = new Date();
			  var thehour = now.getHours();
			
			  if (thehour > 20) display = "night";
			  else if (thehour > 17) display = "night";
			  else if (thehour > 12) display = "afternoon";
			  else if (thehour > 10) display = "morning";
			  else if (thehour > 7) display = "morning";
			  else if (thehour > 4) display = "night";
			  else display = "night";
			
			  styleChange('TOD_', display);
			  }
	
			getCSS();     
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