运行该HTML之后，点击全屏按钮，出现错误“large()函数未定义”，百思不得其解，求高手指教
源代码全文如下：
<!DOCTYPE html>
<html>
<head>
<title>Google Maps JavaScript API v3 Example: Map Simple</title>
<meta name ="viewport" content ="initial-scale=1.0,user-scalable=no" />
<meta charset="UTF-8">
<style type="text/css">
html{margin:0; overflow:hidden; padding:0 0 0 0; _border:0; }
body{margin:0; height:100%; border:0;}
#header {position:absolute; top:0; left:0; width:100%; height:15%;border-bottom:solid 0.5px rgb(200,200,200); background-color:rgb(255,255,255); }
#left_content{position:absolute; width:25%; top:15%; bottom:0; left:0;border-right:solid 0.5px rgb(200,200,200); background-color:rgb(255,255,255);}
#map_canvas{position:absolute;top:15%; bottom:0; left:25%; right:0; background-color:rgb(200,200,200);}
</style>
<script>
function Large(){
document.getElementById("map_canvas").style.width = screen.width;
document.getElementById("map_canvas").style.height = screen.height;
document.getElementById("map_canvas").style.left = 0;
document.getElementById("map_canvas").style.right = 0;
document.getElementById("map_canvas").style.top = 0;
document.getElementById("header").style.display = 'none';
document.getElementById("left_content").style.display = 'none';
document.onkeydown = function esc()
{
// ESCAPE key pressed
if (event.keyCode == 27) {
document.getElementById("header").style.display = 'block';
document.getElementById("left_content").style.display = 'block';
document.getElementById("map_canvas").style.top=15%;
document.getElementById("map_canvas").style.bottom=0;
document.getElementById ("map_canvas").style.left=25%;
document .getElementById ("map_canvas").style.right=0;
}
};
}
</script>
<script type="text/javascript"
src ="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var map;
function initialize() {
var myOptions = {
zoom: 8,
center: new google.maps.LatLng(-34.397, 150.644),
panControl: false,
zoomControl: false,
scaleControl: true,
overviewMapControl:true,
scaleControlOptions: { position: google.maps.ControlPosition.TOP_LEFT },
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'),
myOptions);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="left_content">
55555
</div>
<div id="center_content"></div>