//Heading

var sections=Array ("engineering","sheetmetal","nursery","handling","design","iot")

function showMenu(id) {
 for(i=0;i<sections.length;++i) {
 document.getElementById(sections[i]).style.visibility="hidden"
 }
 document.getElementById(id).style.visibility="visible"
}

function hideMenu() {
  for(i=0;i<sections.length;++i) {
 document.getElementById(sections[i]).style.visibility="hidden"
 }
}

function displayDescription(link) {
 document.getElementById('target').innerHTML=link
 document.getElementById('target_bottom').innerHTML=link
}