Vielen Dank, das war sehr hilfreich, aber...
Jetzt habe ich beide Varianten mit Opera ausprobiert und beide gehen nicht.
Was nun?
map.js
---
function init() {
var myImg = document.createElement("img");
myImg.src = "images/test.jpg";
myImg.useMap = "#map1";
myImg.border = "0";
document.getElementById("content").appendChild(myImg);
if(browser == "microsoft" || browser == "opera"){
var myMap = document.createElement("<MAP NAME='map1'></MAP>");
} else {
var myMap = document.createElement("map");
myMap.name = "map1";
}
var myArea = document.createElement("area");
myArea.shape = "rect";
myArea.coords = "263,44,324,102";
myArea.href = "http://www.heptner.net/";
myArea.target = "_blank";
myArea.alt = "";
myMap.appendChild(myArea);
document.getElementById("content").appendChild(myMap);
}
window.onload = init;
---