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		$("#demolition_link").click(function () {$("#demolition_image").show();});
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		$("#concrete_link").click(function () {$("#demolition_image").hide();});
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		$("#concrete_link").click(function () {$("#concrete_link").addClass('concrete');});
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		$("#concrete_link").click(function () {$("#work_link").removeClass('work');});
		$("#concrete_link").click(function () {$("#environmental_link").removeClass('environmental');});

	});