function showpanel(idpanel,idlabel){clearpanels();clearlabels();setpanel(idpanel,true);setlabel(idlabel,true);}
function clearpanels(){panels=getpanels();for(i=0;i<panels.length;i++){setpanel(panels[i].id,false);}}
function setpanel(idpanel,state){if(idpanel==""||document.getElementById(idpanel)==null)return;if(state){document.getElementById(idpanel).style.display='block';}else{document.getElementById(idpanel).style.display='none';}}
function getpanels(){var ret=new Array();var alldivs=document.getElementsByTagName('div');for(i=0;i<alldivs.length;i++){if(alldivs[i].className=='tabpanel')ret[ret.length]=alldivs[i];}
return ret;}
function clearlabels(){labels=getlabels();for(i=0;i<labels.length;i++){setlabel(labels[i].id,false);}}
function setlabel(idlabel,state){if(idlabel==""||document.getElementById(idlabel)==null)return;if(state){document.getElementById(idlabel).className="tabselected";}else{document.getElementById(idlabel).className='';}}
function getlabels(){return document.getElementById('tabs_navigation').getElementsByTagName('li');}