Question

Here comes my code:

function addAlbum(){
    var attr;
    var parent;
    var newelement;

    /*image*/
    newelement = document.createElement("img");
    newelement.src = "criar_album.png";

    attr = document.createAttribute("id");
    attr.value = "addalbum";
    newelement.setAttributeNode(attr);

    attr = document.createAttribute("usemap");
    attr.value = "#addalbum_map";
    newelement.setAttributeNode(attr);

    parent = document.getElementById("content");
    parent.appendChild(newelement);
    /*-----------------------------------------*/

    /*map*/
    newelement = document.createElement("map");

    attr = document.createAttribute("id");
    attr.value = "album_map";
    newelement.setAttributeNode(attr);

    attr = document.createAttribute("style"); /*this part is failing I guess*/
    attr.value = "cursor:pointer";
    newelement.setAttributeNode(attr);

    attr = document.createAttribute("name");
    attr.value = "addalbum_map";
    newelement.setAttributeNode(attr);

    parent = document.getElementById("addalbum");
    parent.appendChild(newelement);
    /*-----------------------------------------*/

    /*area*/
    newelement = document.createElement("area");

    attr = document.createAttribute("shape");
    attr.value = "rect";
    newelement.setAttributeNode(attr);

    attr = document.createAttribute("coords");
    attr.value = "73, 238, 115, 264";
    newelement.setAttributeNode(attr);

    attr = document.createAttribute("onclick");
    attr.value = "createAlbum()";
    newelement.setAttributeNode(attr);

    attr = document.createAttribute("onmouseover");
    attr.value = "highlightOn(470,320,511,346,2)";
    newelement.setAttributeNode(attr);

    parent = document.getElementById("album_map");
    parent.appendChild(newelement);
    /*-----------------------------------------*/
}

Everything seems to work fine except part of cursor changing whenever I pass it over area element. I have done similar thing with a static image defined in html and it works, so now I’m confused why it doesn’t work for dynamically created map?

P.S.: already defined style for “addalbum” id in CSS but it didn’t helped. Btw, I know, there are ways to do it by a tricky way like defining href but I wanna know what’s the real problem here.

Answer 1

See this answer if you are using chrome or Safari. Cursor not changing to pointer in Usemap/area case

I will add that your code is too complicated. You dont have to add style, id, shape and so on as attributes (attr.value = "cursor:pointer"; will probably never work at all). The code below works fine, results in a nice 1,1,100,100 map with cursor as pointer. But again works only in browsers like Opera and Firefox, but NOT in Chrome or Safari (WebKit).

var body=document.getElementsByTagName('body')[0];

var img = document.createElement("IMG");
img.src='1.gif';
img.useMap='#album_map';

var map = document.createElement("MAP");
map.id="album_map";
map.style.cursor="pointer"; //the right way

var area  = document.createElement("AREA");
area.shape='rect';
area.coords="1, 1, 100, 100";

map.appendChild(area);
body.appendChild(map);
body.appendChild(img);

adding standard events :

bind predefined function :

function imgClick() {
    alert('click');
}

body=document.getElementsByTagName('body')[0];
var img = document.createElement("IMG");
img.src='image.gif';
img.onclick=imgClick;
body.appendChild(img);

or by socalled anonymous function :

img.onclick=function() {
    alert('click');
}