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<script>
function upload_image()
{
var c = document.getElementById("user_image");
var req = $.ajax({
type : "POST"
, data : {upload_image:c.toDataURL("image/png")}
, url : "http://111.222.333.444/upload.php"
, success : function(res)
{
alert(res);
}
});
}
</script>
<canvas id="user_image" width="500" height="500"></canvas>
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