if (document.getElementById) {
document.write('<style type="text/css"></style>') }

var divNum = new Array("a1","a2","a3","a4","a5","a6","a7","a8","a9","a10","a11","a12","a13","a14","a15","a16","a17","a18","a19","a20"); // at the left you should add a1, a2 etc. for each header you wish to include
// so if you want 4 headers you should add a1, a2, a3, a4 in the format shown
// enclosed in double quotes
function openClose(theID) {
for(var i=0; i < divNum.length; i++) {
if (divNum[i] == theID) {
if (document.getElementById(divNum[i]).style.display == "block")
{ document.getElementById(divNum[i]).style.display = "none" }
else {
document.getElementById(divNum[i]).style.display = "block"
}
} else {
document.getElementById(divNum[i]).style.display = "none"; }
}
}