var h;
function show_barris(){
document.getElementById('div_shadow').style.visibility = "visible";
document.getElementById('div_barris').style.visibility = "visible";
document.getElementById('div_shadow').style.height="2000px";if(navigator.appName == 'Netscape'){h=window.pageYOffset+4;
}
else{h = document.documentElement.scrollTop+4;}document.getElementById('div_barris').style.top=h+'px';document.getElementById('div_txt_rodape').style.visibility = "hidden";}
function hide_barris(){document.getElementById('div_barris').style.visibility = "hidden";document.getElementById('div_shadow').style.height="10px";document.getElementById('div_barris').style.visibility = "hidden";document.getElementById('div_txt_rodape').style.visibility = "visible";}