This position-altering code is not correct on layouts where the body …

…has a margin, and I'm not sure how to correct it without breaking the site of whoever contributed this code. I'm disabling it for the default case of a picker attached to the body of the page, which will make te position correct on those pages regardless of body margins.

README.md

@@ -93,8 +93,6 @@ $('input[name="daterange"]').daterangepicker(
 
 `locale`: (object) Allows you to provide localized strings for buttons and labels, and the first day of week for the calendars
 
-`parentEl`: (string or jQuery object) The document object the picker will be appended to at creation; defaults to 'body'
-
 `singleDatePicker`: (boolean) Show only a single calendar to choose one date, instead of a range picker with two calendars; the start and end dates provided to your callback will be the same single date chosen
 
 ## Functions

daterangepicker.js

@@ -443,10 +443,14 @@
         },
 
         move: function () {
-            var parentOffset = {
-                top: this.parentEl.offset().top - (this.parentEl.is('body') ? 0 : this.parentEl.scrollTop()),
-                left: this.parentEl.offset().left - (this.parentEl.is('body') ? 0 : this.parentEl.scrollLeft())
-            };
+            var parentOffset = { top: 0, left: 0 };
+            if (!this.parentEl.is('body')) {
+                parentOffset = {
+                    top: this.parentEl.offset().top - this.parentEl.scrollTop(),
+                    left: this.parentEl.offset().left - this.parentEl.scrollLeft()
+                };
+            }
+
             if (this.opens == 'left') {
                 this.container.css({
                     top: this.element.offset().top + this.element.outerHeight() - parentOffset.top,