site1="http://internalapps.ergotron.com/aspfordnn/";
function combineMenu(frm, menu1) {
with (frm) {
for (var i = 0; i < document.Form.menu1.length; i++) {
if (document.Form.menu1[i].checked) {
str = document.Form.menu1[i].value;
break;
   }
}
url = site1 + str;
document.getElementById('iframe').src = url;
   }
}

// Two options
site2="http://www.ergotron.com/Portals/0/html/";
function combineMenus(frm, menu1, menu2) {
with (frm) {
for (var i = 0; i < document.Form.menu1.length; i++) {
if (document.Form.menu1[i].checked) {
str = document.Form.menu1[i].value;
break;
   }
}
for (var i = 0; i < document.Form.menu2.length; i++) {
if (document.Form.menu2[i].checked) {
str += document.Form.menu2[i].value;
break;
   }
}
url = site2 + str;
document.getElementById('iframe').src = url;
   }
}

// Three options
site3="http://www.ergotron.com/Portals/0/html/";
function combineMenus3(frm, menu1, menu2, menu3) {
with (frm) {
for (var i = 0; i < document.Form.menu1.length; i++) {
if (document.Form.menu1[i].checked) {
str = document.Form.menu1[i].value;
break;
   }
}
for (var i = 0; i < document.Form.menu2.length; i++) {
if (document.Form.menu2[i].checked) {
str += document.Form.menu2[i].value;
break;
   }
}
for (var i = 0; i < document.Form.menu3.length; i++) {
if (document.Form.menu3[i].checked) {
str += document.Form.menu3[i].value;
break;
   }
}
url = site3 + str;
document.getElementById('iframe').src = url;
   }
}