<!--HPB_SCRIPT_PLD_50
HpbImgPreload('_HPB_ROLLOVER1', 'img/b_course_on.gif', 'img/b_course_off.gif');
HpbImgPreload('_HPB_ROLLOVER2', 'img/b_teacher_on.gif', 'img/b_teacher_off.gif');
HpbImgPreload('_HPB_ROLLOVER3', 'img/b_classroom_on.gif', 'img/b_classroom_off.gif');
HpbImgPreload('_HPB_ROLLOVER4', 'img/b_organization_on.gif', 'img/b_organization_off.gif');
HpbImgPreload('_HPB_ROLLOVER5', 'img/b_application_on.gif', 'img/b_application_off.gif');
//-->