var nav_selected=new Array();function nav_subnav_set_display(tab,display){var obj=$('subnav_'+tab);if(obj!=null&&typeof(obj)!='undefined'){obj.style.display=display;}}
function nav_hide_all(location_subnav_id){var children=$(location_subnav_id).childNodes;for(var i=0;i<children.length;i++){if(children[i].nodeType==1&&children[i].id!=null&&children[i].id.indexOf('subnav_')==0){if(nav_selected[location_subnav_id]==null&&children[i].style.display==''){nav_selected[location_subnav_id]=children[i];}
children[i].style.display='none';}}}
function nav_main_over(tab,location_subnav_id,is_empty){nav_hide_all(location_subnav_id);nav_subnav_set_display(tab,'none');$(location_subnav_id).className='';if(!is_empty){nav_subnav_set_display(tab,'');$(location_subnav_id).className='on';}}
function nav_main_out(tab,location_subnav_id){nav_subnav_set_display(tab,'none');$(location_subnav_id).className='';if(nav_selected[location_subnav_id]!=null){nav_selected[location_subnav_id].style.display='';$(location_subnav_id).className='on';}}
function nav_subnav_over(tab,location_subnav_id){nav_subnav_set_display(tab,'');$('nav_'+tab).className='nav_'+tab+' on';$(location_subnav_id).className='on';if(nav_selected[location_subnav_id]!=null){nav_selected[location_subnav_id].style.display='none';}}
function nav_subnav_out(tab,location_subnav_id){nav_subnav_set_display(tab,'none');$('nav_'+tab).className='nav_'+tab;$(location_subnav_id).className='';if(nav_selected[location_subnav_id]!=null){nav_selected[location_subnav_id].style.display='';$(location_subnav_id).className='on';}}