sofish/img_preload.html

## img_preload.html
<!DOCTYPE html>
<html lang="">
<head>
	<meta charset="utf-8" />
	<title>hihi</title>
</head>
<body>

<img id="thepic" src="javascript:''" />

<script type="text/javascript">

var preloadImg = function(url){
        var img = new Image();
        img.src = url;

        if(img.complete){
           alert('complete')
           document.getElementById('thepic').src = url;
           retrun;
        }

        img.onload = function(){
            alert('onload')
            document.getElementById('thepic').src = url;
        };
    };

preloadImg('http://sofish.de/mypics/alipay_logo.png');


</script>

</body>
</html>
	<!DOCTYPE html>
	<html lang="">
	<head>
	<meta charset="utf-8" />
	<title>hihi</title>
	</head>
	<body>

	<img id="thepic" src="javascript:''" />

	<script type="text/javascript">

	var preloadImg = function(url){
	var img = new Image();
	img.src = url;

	if(img.complete){
	alert('complete')
	document.getElementById('thepic').src = url;
	retrun;
	}

	img.onload = function(){
	alert('onload')
	document.getElementById('thepic').src = url;
	};
	};

	preloadImg('http://sofish.de/mypics/alipay_logo.png');


	</script>

	</body>
	</html>