function showHide(form){
for(var i=0;i<document.getElementsByTagName('div').length;i++){
if(/hide/.test(document.getElementsByTagName('div')[i].className))
document.getElementsByTagName('div')[i].style.display = 'none';
}

if(document.getElementById(form['selectsection'].value))
document.getElementById(form['selectsection'].value).style.display = 'block';
}