function hideDiv(katman,katman_text) { 
if (document.getElementById) { // DOM3 = IE5, NS6 
document.getElementById(katman).style.visibility = 'hidden'; 
document.getElementById(katman_text).style.visibility = 'hidden'; 
} 
else { 
if (document.layers) { // Netscape 4 
document.layers[katman].visibility = 'hidden'; 
document.layers[katman_text].visibility = 'hidden'; 
} 
else { // IE 4 
document.all[katman].style.visibility = 'hidden'; 
document.all[katman_text].style.visibility = 'hidden'; 
} 
} 
}
function showDiv(katman,katman_text) { 
if (document.getElementById) { // DOM3 = IE5, NS6 
document.getElementById(katman).style.visibility = 'visible'; 
document.getElementById(katman_text).style.visibility = 'visible'; 
} 
else { 
if (document.layers) { // Netscape 4 
document.layers[katman].visibility = 'visible'; 
document.layers[katman_text].visibility = 'visible'; 
} 
else { // IE 4 
document.all[katman].style.visibility = 'visible'; 
document.all[katman_text].style.visibility = 'visible'; 
} 
} 
}