Prevent scrollbar click from closing dropdown in IE, fixes selectize#182

Author: Seb Flippence

src/selectize.js

@@ -156,7 +156,7 @@ $.extend(Selectize.prototype, {
 			keypress  : function() { return self.onKeyPress.apply(self, arguments); },
 			resize    : function() { self.positionDropdown.apply(self, []); },
 			blur      : function() { return self.onBlur.apply(self, arguments); },
-			focus     : function() { return self.onFocus.apply(self, arguments); }
+			focus     : function() { self.ignoreBlur = false; return self.onFocus.apply(self, arguments); }
 		});
 
 		$document.on('keydown' + eventNS, function(e) {
@@ -519,8 +519,11 @@ $.extend(Selectize.prototype, {
 		self.isFocused = false;
 		if (self.ignoreFocus) return;
 
-		if (document.activeElement === self.$dropdown_content[0]) {
-			self.$control_input.focus();
+		// necessary to prevent IE closing the dropdown when the scrollbar is clicked
+		if (!self.ignoreBlur && document.activeElement === self.$dropdown_content[0]) {
+			self.ignoreBlur = true;
+			self.onFocus(e);
+
 			return;
 		}