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POChrome hangs when using javascript to check many checkboxes, while firefox does it instantly
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  1. POChrome hangs when using javascript to check many checkboxes, while firefox does it instantly
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    copied!<p>I'm using an asp:Repeater server side control that contains a table as it's repeatable item. One of the td tags in the table contains a checkbox. In the header of the repeater I have a checkbox with id="selectAllCheck".</p> <p>I have the following javascript code</p> <pre><code> var checkBox = document.getElementById('selectAllCheck'); function changeAll() { if (checkBox.checked == 1) { $('input:checkbox').attr('checked', "checked"); } else { $('input:checkbox').attr('checked', ""); } } checkBox.onchange = changeAll; </code></pre> <p>This works just fine in firefox, instantly all the checkboxes are either checked or unchecked when necessary. However, in chrome it takes about 10 seconds. I do have about 250 checkboxes on the page by the way, but even putting that number down to only 15, I can see that it is still not instant with chrome, but much faster.</p> <p>If anyone has encountered this problem before, seen any articles related to this problem, or knows how to solve this problem I would be very thankful.</p> <p>EDIT: Posted the page</p> <pre><code>&lt;asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"&gt; &lt;/asp:Content&gt; &lt;asp:Content ID="Content2" ContentPlaceHolderID="ContentMain" Runat="Server"&gt; &lt;form id="webForm" runat="server"&gt; &lt;asp:Label ID="sourceLabel" runat="server" AssociatedControlID="sourceList" Text="Source"&gt;&lt;/asp:Label&gt; &lt;asp:DropDownList ID="sourceList" runat="server" /&gt;&amp;nbsp; &lt;asp:Button ID="showButton" runat="server" Text="View" /&gt; &lt;asp:Repeater ID="Repeater_DIBS" runat="server"&gt; &lt;HeaderTemplate&gt; &lt;table&gt; &lt;tr&gt;&lt;th&gt;&lt;input type="checkbox" id="selectAllCheck" /&gt; (un)check All&lt;/th&gt; &lt;th&gt;SourceID&lt;/th&gt;&lt;th&gt;FieldID&lt;/th&gt;&lt;th&gt;Source Indicator&lt;/th&gt;&lt;th&gt;Date Data Updated&lt;/th&gt; &lt;th&gt;Message&lt;/th&gt;&lt;/tr&gt; &lt;/HeaderTemplate&gt; &lt;ItemTemplate&gt; &lt;tr&gt; &lt;td style='width:1%;white-space:nowrap;'&gt;&lt;input type='checkbox' class='checkBoxes' /&gt;&lt;/td&gt; &lt;td style='width:1%;white-space:nowrap;'&gt;&lt;%# Eval("SourceID") %&gt;&lt;/td&gt; &lt;td style='width:1%;white-space:nowrap;'&gt;&lt;%# Eval("FieldID") %&gt;&lt;/td&gt; &lt;td class='indicator' style='width:1%;white-space:nowrap;'&gt;&lt;%# Eval("SourceIndicator") %&gt;&lt;/td&gt; &lt;td style='width:1%;white-space:nowrap;'&gt;&lt;%# Eval("DateDataUpdated") %&gt;&lt;/td&gt; &lt;td style='width:1%;white-space:nowrap;' class='status'&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/ItemTemplate&gt; &lt;FooterTemplate&gt; &lt;/table&gt; &lt;/FooterTemplate&gt; &lt;/asp:Repeater&gt; &lt;/form&gt; &lt;/asp:Content&gt; &lt;asp:Content ID="Content3" ContentPlaceHolderID="ContentJS" Runat="Server"&gt; &lt;script type="text/javascript"&gt; $("#selectAllCheck").change(function () { if (this.checked) { $("input:checkbox.checkBoxes").attr("checked", "checked"); } else { $("input:checkbox.checkBoxes").removeAttr("checked"); } }); &lt;/script&gt; &lt;/asp:Content&gt; </code></pre>
 

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