Add GUI documentation URLs

gui/red/main.js

 			]
 	});
 
+	// from http://css-tricks.com/snippets/javascript/get-url-variables/
+	function getQueryVariable(variable) {
+		var query = window.location.search.substring(1);
+		var vars = query.split("&");
+		for (var i=0;i<vars.length;i++) {
+			var pair = vars[i].split("=");
+			if(pair[0] == variable){return pair[1];}
+		}
+		return(false);
+	}
+
 	function loadNodes() {
-		console.log("loadNodes");
 		$.get('list.html', function(data) {
-			console.log("loadNodes complete");
 			$("body").append(data);
 			$(".palette-spinner").hide();
 			$(".palette-scroll").show();
 				$("#btn-deploy").removeClass("disabled").addClass("btn-danger");
 			}, 1500);
 			$('#btn-deploy').click(function() { save(); });
+			// if the query string has ?info=className, populate info tab
+			var info = getQueryVariable("info");
+			if (info) {
+				$("#tab-info").html('<div class="node-help">'
+					+($("script[data-help-name|='"+info+"']").html()||"")+"</div>");
+			}
 		}, "html");
 	}
 

gui/red/nodes.js

 	function getType(type) {
 		return node_defs[type];
 	}
-
+	function selectNode(name) {
+		window.history.pushState(null, null, window.location.protocol + "//"
+			+ window.location.host + window.location.pathname + '?info=' + name);
+	}
 	function addNode(n) {
 		if (n._def.category == "config") {
 			configNodes[n.id] = n;
 		registerType: registerType,
 		getType: getType,
 		convertNode: convertNode,
+		selectNode: selectNode,
 		add: addNode,
 		addLink: addLink,
 		remove: removeNode,

gui/red/ui/palette.js

 				  content: $(($("script[data-help-name|='"+nt+"']").html()||"<h2>empty</h2><p>no information available</p>").trim())[2] // TODO: how to use jQuery to always select the first <p> within the html?
 		  });
 		  $(d).click(function() {
-				  var help = '<div class="node-help">'+($("script[data-help-name|='"+d.type+"']").html()||"")+"</div>";
-				  $("#tab-info").html(help);
+				RED.nodes.selectNode(d.type);
+				var help = '<div class="node-help">'+($("script[data-help-name|='"+d.type+"']").html()||"")+"</div>";
+				$("#tab-info").html(help);
 		  });
 		  $(d).draggable({
 			  helper: 'clone',

gui/red/ui/view.js

 		}
 		if (moving_set.length == 1) {
 			RED.sidebar.info.refresh(moving_set[0].n);
+			RED.nodes.selectNode(moving_set[0].n.type);
 		} else {
 			RED.sidebar.info.clear();
 		}