Merge remote-tracking branch 'origin/master'

NEWS.txt

@@ -58,6 +58,8 @@ Bug fixes
 
 - Prevent i from being declared global in extractRange (reported by
   Alexander Obukhov, issue 627).
+- Throw errors in a more cross-browser-compatible manner (patch by
+  Eddie Kay)
 
 - Prevent pie slice outlines from being drawn when the stroke width is
   zero (reported by Chris Minett, issue 585)

jquery.flot.js

@@ -716,7 +716,7 @@
             canvasHeight = placeholder.height();
             
             if (canvasWidth <= 0 || canvasHeight <= 0)
-                throw "Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight;
+                throw new Error("Invalid dimensions for plot, width = " + canvasWidth + ", height = " + canvasHeight);
         }
 
         function resizeCanvas(c) {