Test Case Boilerplate
Fork this way...
HTML
<script src="http://code.jquery.com/ui/jquery-ui-git.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/ui/jquery-ui-git.css">
<h3>Constrain movement along an axis:</h3>
<div id="draggable" class="draggable ui-widget-content">
<p>I can be dragged only vertically</p>
</div>
<div id="draggable2" class="draggable ui-widget-content">
<p>I can be dragged only horizontally</p>
</div>
<h3>Or to within another DOM element:</h3>
<div id="containment-wrapper">
<div id="draggable3" class="draggable ui-widget-content">
<p>I'm contained within the box</p>
</div>
<div class="draggable ui-widget-content">
<p id="draggable5" class="ui-widget-header">I'm contained within my parent</p>
</div>
</div>
CSS
.draggable { width: 90px; height: 90px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
#draggable, #draggable2 { margin-bottom:20px; }
#draggable { cursor: n-resize; }
#draggable2 { cursor: e-resize; }
#containment-wrapper { width: 95%; height:150px; border:2px solid #ccc; padding: 10px; }
h3 { clear: left; }
JavaScript
$( "#draggable" ).draggable({ axis: "y" });
$( "#draggable2" ).draggable({ axis: "x" });
$( "#draggable3" ).draggable({ containment: "#containment-wrapper", scroll: false });
$( "#draggable5" ).draggable({ containment: "parent" });
$("#draggable").css('top', '4000px');
$("#draggable5").parent().css('position','fixed');
$("#draggable5").draggable('option','containment', 'html');