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一个伪ajax图片上传代码实现示例

2014-03-17 00:00 1086 查看

<?php 
if($_FILES){ 
?> 
<script> 
window.parent.ajaxUploadPicture.uploadCallback('http://img0.bdstatic.com/img/image/5099213b07eca8065380ce7f75e95dda144ad348269.jpg'); 
</script> 
<?php 
die; 
} 
?> 
<!DOCTYPE html> 
<html> 
<head> 
<script> 
ajaxUploadPicture = { $o1:'' }; 
ajaxUploadPicture.ajaxUploadFile = function ($o){ 
this.$o1 = $o; 
var $iframe = document.createElement('iframe'); 
$iframe.style.display = 'none'; 
$iframe.name = 'iframe'; 
$iframe.id = 'iframe'; 
document.body.appendChild($iframe); 
var $form = document.createElement("form"); 
$form.method = "post"; 
$form.enctype = "multipart/form-data"; 
$form.action = ""; 
$form.target = 'iframe'; 
$newO = $o.cloneNode(); 
$form.appendChild($newO); 
$form.submit(); 
} 
ajaxUploadPicture.uploadCallback = function ($url){ 

$pic = document.createElement('img'); 
$pic.width = "200"; 
$pic.height = "150"; 
$pic.src = $url; 

if(document.getElementById('picshow') == null){ 
$div = document.createElement("div"); 
$div.id = 'picshow'; 
this.$o1.parentNode.insertBefore($div,this.$o1.nextSibling); 
}else{ 
$div = document.getElementById('picshow'); 
} 
$div.innerHTML = ''; 
$div.appendChild($pic); 
}; 
</script> 
</head> 
<body> 
<input type="file" name="file" onchange = "ajaxUploadPicture.ajaxUploadFile(this);"> 
</body> 
</html>

面向对象思想，form提交到一个隐藏的iframe，执行回调js函数。实现图片回显。后台php的功能没有完善。

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