javascript - Move items between two ListBoxes in ASP.Net using JQuery -


i want move items between 2 listboxes in asp.net using jquery/javascript , below code working perfectly.

function additems() {     var totalitemsselected = 0;     var currentitems = 0;     var messagelabel = document.getelementbyid('<%=lblitprogrammingmessage.clientid%>');     var selectedoptions = jquery('#<%=listitprogramming.clientid %> option:selected');      if (selectedoptions.length == 0) {         messagelabel.innerhtml = "please select skill(s) add.";         jquery('#<%= lblitprogrammingmessage.clientid %>').fadeout(2000, function () { messagelabel.innerhtml = ""; });         jquery('#<%= lblitprogrammingmessage.clientid %>').fadein(500, function () { });         return false;     }      jquery('select[name$=listmyitprogramming] > option').each(function () { currentitems++; });      if (currentitems == 30) {         messagelabel.innerhtml = "maximum limit (30) reached. cannot add more skills.";         jquery('#<%= lblitprogrammingmessage.clientid %>').fadeout(2000, function () { messagelabel.innerhtml = ""; });         jquery('#<%= lblitprogrammingmessage.clientid %>').fadein(500, function () { });         return false;     }      totalitemsselected = currentitems + selectedoptions.length;      if (totalitemsselected > 30) {         messagelabel.innerhtml = "you can select " + (30 - currentitems) + " item(s) more.";         jquery('#<%= lblitprogrammingmessage.clientid %>').fadeout(2000, function () { messagelabel.innerhtml = ""; });         jquery('#<%= lblitprogrammingmessage.clientid %>').fadein(500, function () { });         return false;     }      if (selectedoptions.length == 1) {         if (jquery("#<%=listmyitprogramming.clientid %> option[value='" + selectedoptions.val() + "']").length > 0) {         }         else {             jquery('#<%=listmyitprogramming.clientid %>').append(jquery(selectedoptions).clone());         }     }     else if (selectedoptions.length > 1) { jquery(selectedoptions).each(function () { if (jquery("#<%=listmyitprogramming.clientid %> option[value='" + this.value + "']").length > 0) { } else { jquery('#<%=listmyitprogramming.clientid %>').append(jquery(this).clone()); } }); }     jquery(selectedoptions).remove();      var hdn2 = "";     jquery('select[name$=listmyitprogramming] > option').each(function () { hdn2 += jquery(this).attr('value') + ','; });     jquery("#<%= listmyitprogrammingvalues.clientid %>").val(hdn2);      return false; }

but code limited 1 set of listboxes have hard coded listbox names 'listitprogramming' , 'listmyitprogramming'.

can make dynamic 2 parameters in existing function?

enclose list control in old-fashioned html tag known, hardcoded id. example:

<div id="list1container">     <asp:listbox runat="server" id="list1"/> </div>

in javascript, access list control using div's id (list1container) , jquery's ":first-child" selector. ta da! can reference list control without knowing id @ all, don't have messy code injection more.

bonus: using technique, can write static .js files, means can use minification , caching , improve performance.


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