//insert in ztreeSettingsCallback.ztreeSettingsCallback.beforeDrag


"function (treeId, treeNodes) {

    for (var y=0,l=treeNodes.length; y<l; y++) {
        var treeNode = treeNodes[y];
        var extraOptions = treeNode.extra.split(',');
        
        for (i=0;i<extraOptions.length;i++) {
            var option = extraOptions[i].split(':');

            if (option[0] == 'drag') {
                if (option[1] == 'false') return false;
            } 
                    else if (treeNode.parentTId) {
                    var parentNodeExtraOptions = getParentNode().extra.split(',');
                    
                    for (x=0;x<parentNodeExtraOptions.length;x++) {
                        var poption = parentNodeExtraOptions[x].split(':');
                        if (poption[0] == 'childDrag') {
                            if (poption[1] == 'false') return false;
                        }
                    }
                }
        }
    }
    return true;
}"