See #122: Merged new maxWidth option.

README.md

@@ -135,6 +135,7 @@ var b = $.isScrollToFixed('.header');
 * __postAbsolute__ - the function handler triggered just after the element leaves absolute.
 * __offsets__ - (true|false|not present) some websites have needed an adjustment to the left position of the element due to something in their layout.  This option turns this adjustment on.
 * __minWidth__ (number) - the minimum width the window must be to "fix" the target element.  Turns off the functionaility when the window width is less than specified.
+* __maxWidth__ (number) - the maximum width the window must be to "fix" the target element.  Turns off the functionaility when the window width is more than specified.
 * __dontCheckForPositionFixedSupport__ - (true|false|not present) some devices do not support position fixed; we check to see if it does.  This option turns off that check if set to true.
 * __dontSetWidth__ - (true|false|not set) box sizing that does not set the width on the target element when it goes fixed or absolute.
 * __removeOffsets__ - (true|false|not set) recalculate top offset and delete left offset when the element goes absolute.

jquery-scrolltofixed.js

@@ -262,6 +262,13 @@
                     setUnfixed();
                     target.trigger('unfixed.ScrollToFixed');
                 }
+            } else if (base.options.maxWidth && $(window).width() > base.options.maxWidth) {
+                if (!isUnfixed() || !wasReset) {
+                    postPosition();
+                    target.trigger('preUnfixed.ScrollToFixed');
+                    setUnfixed();
+                    target.trigger('unfixed.ScrollToFixed');
+                }
             } else if (base.options.bottom == -1) {
                 // If the vertical scroll position, plus the optional margin, would
                 // put the target element at the specified limit, set the target
@@ -355,7 +362,7 @@
             if(target.is(':visible')) {
                 isReset = false;
                 checkScroll();
-			}
+            }
         }
 
         var windowScroll = function(event) {