Add event handler for body.onload by javascript within <body> part
We want to include a maps from Google Maps API in our document. The documentation tells to initialize the map with a function called by the onload() event of the body.
The ordinary way to call:
<body onload="initialize_map();">
This doesn't work out for us because we're using Template::Toolkit and the <body> tag is already included in our wrapper. In short: The <body> tag is already printed when our javascript code starts running.
I tried something like this but it does only work for onclick, not onload. I guess that's because the javascript code is beneath the <body> tag itself.
var body = document.getElementsByTagName("body")[0];
body.addEventListener("load", init(), false);
function init() {
alert("it works!");
};
Any help how to fire up a Google Maps map appreciated!
Answer
body.addEventListener("load", init(), false);
That init() is saying run this function now and assign whatever it returns to the load event.
What you want is to assign the reference to the function, not the result. So you need to drop the ().
body.addEventListener("load", init, false);
Also you should be using window.onload and not body.onload
addEventListener is supported in most browsers except IE 8.