ihave.to/client/vendor/jquery/jquery.cursorposition.js

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$.fn.setCursorPosition = function(position) {
	if (this.length == 0)
		return this;
	return $(this).setSelection(position, position);
};

$.fn.setSelection = function(selectionStart, selectionEnd) {
	if (this.length == 0)
		return this;

	input = this[0];

	if (input.createTextRange) {
		var range = input.createTextRange();
		range.collapse(true);
		range.moveEnd('character', selectionEnd);
		range.moveStart('character', selectionStart);
		range.select();
	} else if (input.setSelectionRange) {
		input.focus();
		input.setSelectionRange(selectionStart, selectionEnd);
	}

	return this;
};

$.fn.focusEnd = function() {
	this.setCursorPosition(this.val().length);
	return this;
};