Fix regular expression; folder name may contain special characters.

svncommit

2007-09-27 492ba91415719750b6b42a957329eb2e1a2e9e93

 program/js/app.js

@@ -2463,7 +2463,7 @@
    var reg = RegExp('['+RegExp.escape(this.env.delimiter)+']?[^'+RegExp.escape(this.env.delimiter)+']+$');
    if (this.drag_active && this.check_droptarget(id) &&
        (id != this.env.folder.replace(reg, '')) &&
        (!id.match(new RegExp('^'+this.env.folder+RegExp.escape(this.env.delimiter)))) &&
        (!id.match(new RegExp('^'+RegExp.escape(this.env.folder+this.env.delimiter)))) &&
        (row = document.getElementById(this.get_folder_row_id(id))))
      if (find_in_array(this.env.defaultfolders, id)>=0)
        {