<!--
function hideall() {
 hidediv('div_content0');
 hidediv('div_content1');
  document.getElementById("tab1").src='imgs/2010/menu1_off.gif';
 hidediv('div_content2');
  document.getElementById("tab2").src='imgs/2010/menu2_off.gif';
 hidediv('div_content3');
  document.getElementById("tab3").src='imgs/2010/menu3_off.gif';
 hidediv('div_content4');
  document.getElementById("tab4").src='imgs/2010/menu4_off.gif';
 hidediv('div_content5');
  document.getElementById("tab5").src='imgs/2010/menu5_off.gif';
}


function hidediv(layer_ref) { 
state = 'none'; 
if (document.all) { //IS IE 4 or 5 (or 6 beta) 
eval( "document.all." + layer_ref + ".style.display = state"); 
} 
if (document.layers) { //IS NETSCAPE 4 or below 
document.layers[layer_ref].display = state; 
} 
if (document.getElementById &&!document.all) { 
hza = document.getElementById(layer_ref); 
hza.style.display = state; 
} 
} 


function showdiv(layer_ref) { 
state = 'block'; 
if (document.all) { //IS IE 4 or 5 (or 6 beta) 
eval( "document.all." + layer_ref + ".style.display = state"); 
} 
if (document.layers) { //IS NETSCAPE 4 or below 
document.layers[layer_ref].display = state; 
} 
if (document.getElementById &&!document.all) { 
hza = document.getElementById(layer_ref); 
hza.style.display = state; 
} 
}
//-->