Prevent drag-start in IE when scrolling on an element with a scrollbar

[d2a-raudenaerde]

Hi,

Currently, in IE11, if you mousedown on a scollbar to scroll a DIV with overflow:scroll, this registers as a start-of-drag and drop.

It can be prevented by returning early in the dragsource:

				$(element).on('mousedown', selectors.initiate, function(event) {
					if ($(event.target).is('input,select,option,button,textarea')) {
						return;
					}
					if (inScrollRange(event)) {
						console.log("No drag and drop, we are on a scrollbar!");
						return;
					}

The imlementation of inScrollRange can be taken from: http://jsfiddle.net/aKejW/

I got this to work, but it is still a bit messy. Maybe you have a better idea?