var xhide = 0, xhide2 = 0;
var thesubs = new Array("what","course","teach","nor","who");
function swapImg(image,st){
eval('document.' + image + '.src = "images/' + st + '.gif"');
}
function swapImg2(image,st){
eval('document.' + image + '.src = "../images/' + st + '.gif"');
}
function showSub(sub){
if (!(navigator.userAgent.indexOf("Gecko") > 0 && navigator.userAgent.indexOf("KHTML") > 0)){
clearTimeout(xhide);
clearTimeout(xhide2);
var closeSubs = new Array();
document.getElementById(sub+"sub").style.display = "inline";
var j =0;
for(i=0;i<thesubs.length;i++){
if(thesubs[i] != sub){
closeSubs[j] = thesubs[i];
j = j + 1;
}
}
for(i=0;i<closeSubs.length;i++){
closeSub(closeSubs[i]);
}
}
}
function showSub2(sub){
if (!(navigator.userAgent.indexOf("Gecko") > 0 && navigator.userAgent.indexOf("KHTML") > 0)){
clearTimeout(xhide);
clearTimeout(xhide2);
document.getElementById(sub+"sub").style.display = "inline";
}
}
function hideSub(sub){
if (!(navigator.userAgent.indexOf("Gecko") > 0 && navigator.userAgent.indexOf("KHTML") > 0)){
x = sub;
xhide = setTimeout('closeSub(x)',250);
if(sub == "teach"){
xhide2 = setTimeout('closeSub("course")',250);
}
}
}
function closeSub(sub){
document.getElementById(sub+"sub").style.display = "none";
}