function expand(list,content){
if (document.getElementById(list) && document.getElementById(content)){
document.getElementById(list).style.listStyleImage='url(images/expand.gif)'; 
document.getElementById(content).style.display = 'block';}
}

function collapse(list,content){
if (document.getElementById(list) && document.getElementById(content)){
document.getElementById(list).style.listStyleImage= 'url(images/collapse.gif)';
document.getElementById(content).style.display ='none';}
}

function togglenext(first,second,next){
if (document.getElementById(first) && document.getElementById(second) && document.getElementById(next)){
document.getElementById(first).style.display ='none';
document.getElementById(second).style.display ='none';
document.getElementById(next).style.display = 'block';}
}

function showobj(obj){
if (document.getElementById(obj).style.display ='none'){
document.getElementById(obj).style.display = 'block';}
}

function hideobj(obj){
if (document.getElementById(obj)){
document.getElementById(obj).style.display = 'none';}
}