How to set plug-in's property?

How to set plug-in's property?

Hello,

I am using JQuery's Simple Tree plugin with following defination,

$.fn.simpleTree = function(opt){
    //alert("1");
    return this.each(function(){
        var TREE = this;
        var ROOT = $('.root',this);
        var mousePressed = false;
        var mouseMoved = false;
        var dragMoveType = false;
        var dragNode_destination = false;
        var dragNode_source = false;
        var dragDropTimer = false;
        var ajaxCache = Array();
        var ownerElOfDraggingItem;
        var restoredData;
       
        TREE.option = {
            drag:        true,
            animate:    false,
            autoclose:    false,
            speed:        'slow',
            afterAjax:    false,
            afterMove:    false,
            afterClick:    false,
            afterDblClick:    false,
            // added by Erik Dohmen (2BinBusiness.nl) to make context menu cliks available
            afterContextMenu:    false,
            docToFolderConvert:false,
            cookieId: "simpletree_cookie",
            restoreTreeState:true
        };

/* Remaining functions*/

}

If i want to set drag property then i directly change it from above. But, if i want to implement above plug-in on different module in same project then how can i set the property of plug-in?