用iframe模拟ajax上传
index.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
</head>
<body>
<form id="content" action="upload.php" method="post" target="uploadFrame" enctype="multipart/form-data">
<input type="file" name="upload">
<input type="submit" value="submit">
<iframe name="uploadFrame" style="display:none;"></iframe>
</form>
<div><img src='' id='uploadPic'></div>
<script type="text/javascript">
function showPic(img){
var imgObj = document.getElementById('uploadPic');
imgObj.src = img;
}
</script>
</body>
</html>
upload.php
<?php
if(move_uploaded_file($_FILES["upload"]["tmp_name"], "img/a.jpg"))
{
echo ("<script type=\"text/javascript\">parent.showPic('img/a.jpg')</script>");
}
?>