function buildTree(){   //$(‘.tree li:has(ul)‘).addClass(‘parent_li‘).find(‘ > span‘).attr(‘title‘, ‘Collapse this branch‘);   $(‘.tree li.parent_li > span‘).on(‘click‘, function (e) {        var children = $(this).parent(‘li.parent_li‘).find(‘ > ul > li‘);        if (children.is(":visible")) {            children.hide(‘fast‘);            $(this).attr(‘title‘, ‘Expand this branch‘).find(‘ > i‘).addClass(‘icon-plus-sign‘).removeClass(‘icon-minus-sign‘);        } else {            children.show(‘fast‘);            $(this).attr(‘title‘, ‘Collapse this branch‘).find(‘ > i‘).addClass(‘icon-minus-sign‘).removeClass(‘icon-plus-sign‘);        }        e.stopPropagation();   }); $(‘.child_li‘).on(‘click‘, function (e) {        $(this).toggle(         function(){         $("input",$(this)).attr("checked",true)         },         function(){         $("input",$(this)).attr("checked",false)         });   });}