About function scopes in javascript
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by Shawn
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Published on 2010-05-02T00:33:36Z
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2010/05/02
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Look at the code below. I want to alert the value of i at the moment that specific listener was added. Is other words, clicking each marker should alert a different value. Where can I store the value of i in a way that it won't change and be accessible inside the scope of that function? Here is problematic code: (it is difficult to test because you need a key from Google)
<html>
<head>
<title>a</title>
<script type="text/javascript">
function init()
{
map = new GMap2(document.getElementById("map_canvas")); // http://code.google.com/intl/es/apis/maps/documentation/reference.html#GMap2
map.setCenter(new GLatLng(0, 0), 1); // http://code.google.com/intl/es/apis/maps/documentation/reference.html#GMap2.setCenter
for(var i = 0; i < 10; i++)
{
var marker = new GMarker(point); // http://code.google.com/intl/es/apis/maps/documentation/reference.html#GMarker
map.addOverlay(marker); // http://code.google.com/intl/es/apis/maps/documentation/reference.html#GMap2.addOverlay
GEvent.addListener(marker, "click", function() // http://code.google.com/intl/es/apis/maps/documentation/reference.html#GEvent.addListener
{
alert(i); // Problem: I want the value of i at the moment when the listener is added.
});
}
}
window.onload = init;
</script>
</head>
<body id="map_canvas">
</body>
</html>
Thanks!
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