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    <p>Maybe this could be optimized somehow and yet I have tested it in Chrome only, but I think it will work in other browsers too. There is no need of jQuery UI for this, it's hand made ;)</p> <pre><code>$(function() { var selectableLi = $('#selectable li'); selectableLi.mousedown(function(){ var startIndex, endIndex, mouseUpOnLi = false; // When dragging starts, remove classes active and hover selectableLi.removeClass('active hover'); // Give the element where dragging starts a class $(this).addClass('active'); // Save the start index startIndex = $(this).index(); // Bind mouse up event selectableLi.bind('mouseup', function(){ // Mouse up is on a li-element mouseUpOnLi = true; $(this).addClass('active'); // Remove the events for mouseup, mouseover and mouseout selectableLi.unbind('mouseup mouseover mouseout'); // Store the end index endIndex = $(this).index(); // Swap values if endIndex &lt; startindex if(endIndex &lt; startIndex){ var tmp = startIndex; startIndex = endIndex; endIndex = tmp; } // Give the selected elements a colour for(i=startIndex; i&lt;=endIndex; i++){ $(selectableLi[i]).addClass('active'); } }).bind('mouseover', function(){ // Give elements a hover class when hovering $(this).addClass('hover'); }).bind('mouseout', function(){ // Remove the hover class when mouse moves out the li $(this).removeClass('hover'); }); $(document).bind('mouseup', function(e){ // When mouse up is outside a li-element if(!mouseUpOnLi){ selectableLi.removeClass('active'); } $(this).unbind('mouseup'); }); }).attr("unselectable","on").css("MozUserSelect","none").bind("selectstart",function(){return false}); }); </code></pre> <p>I've got an <strong><a href="http://harmen.no-ip.org/so/selection.html" rel="nofollow noreferrer">example online</a></strong>. Note that items don't have a background colour when selecting; I think this will give a better performance.</p> <hr> <p><strong>UPDATE - <a href="http://harmen.no-ip.org/so/selection2.html" rel="nofollow noreferrer">Example 2</a></strong></p> <p>I updated it so the selection is visible while selecting:</p> <pre><code>var selectableLi; function colourSelected(a, b, Class){ selectableLi.removeClass(Class); // Swap values if a &gt; b if(a &gt; b){ var tmp = a; a = b; b = tmp; } // Give the selected elements a colour for(i=a; i&lt;=b; i++){ $(selectableLi[i]).addClass(Class); } } $(function() { selectableLi = $('#selectable li'); selectableLi.mousedown(function(){ var startIndex, endIndex, mouseUpOnLi = false; // When dragging starts, remove classes active and hover selectableLi.removeClass('active hover'); // Give the element where dragging starts a class $(this).addClass('active'); // Save the start index startIndex = $(this).index(); // Bind mouse up event selectableLi.bind('mouseup', function(){ // Mouse up is on a li-element mouseUpOnLi = true; $(this).addClass('active'); // Remove the events for mouseup, mouseover and mouseout selectableLi.unbind('mouseup mouseover mouseout'); colourSelected(startIndex, $(this).index(), 'active'); }).bind('mouseover mouseout', function(){ // Give elements a hover class when hovering colourSelected(startIndex, $(this).index(), 'hover'); }); $(document).bind('mouseup', function(e){ // When mouse up is outside a li-element if(!mouseUpOnLi){ selectableLi.removeClass('active hover'); } $(this).unbind('mouseup'); selectableLi.unbind('mouseover mouseout'); }); }).attr("unselectable","on").css("MozUserSelect","none").bind("selectstart",function(){return false}); }); </code></pre> <p>Again, maybe this code could be optimized somehow for performance.</p>
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    1. COThanks for taking the time to write this! I will give it a try. However, I have tried my hand at writing something like this on my own and my app needs to be quite performant, as I've added in the "P/S" section of my question. Either way, I'll post back here with news on how it went.
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