Don't calculate info if same or heading
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		@@ -15,6 +15,7 @@ $(document).ready(function() {
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		$('#calctnd').click(function() {
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			removeEntity('arrow');
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			lastInputBox = null;
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			if ( $('#pointa  option:selected').text() != $('#pointb  option:selected').text() && (!$('#pointa  option:selected').text().match("[=.] (.+) [=.]") && !$('#pointb  option:selected').text().match("[=.] (.+) [=.]"))) {
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			$('#cal_start').html( $('#pointa  option:selected').text() );
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			$('#cal_end').html( $('#pointb  option:selected').text() );
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			$('#cal_speed').html( $('#speed').val() +" " + $('#speedunit option:selected').val() );
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@@ -22,8 +23,7 @@ $(document).ready(function() {
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			var eta = calcETA({'speed': $('#speed').val(), 'unit':  $('#speedunit option:selected').val()},dist)
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			$('#cal_eta').html( timeformat(eta) );
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			$('#cal_dist').html( dist.toFixed(2) + " PC");
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			if ( $('#pointa  option:selected').text() != $('#pointb  option:selected').text() ) {
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				drawline(grabPositionByName($('#pointa  option:selected').text()),grabPositionByName($('#pointb  option:selected').text()));
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			drawline(grabPositionByName($('#pointa  option:selected').text()),grabPositionByName($('#pointb  option:selected').text()));
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			}
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		});
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