其实这个的主要部分并不是一个jquery，但是必须使用到
php程序部分，也只需要这个一个php程序就可以了
www.corange.cn亲测
<?php
header("Content-Type: text/html; charset=utf-8");
@header( "Cache-Control: no-cache, must-revalidate" );
@header( "Pragma: no-cache" );
@header( "Last-Modified: " . gmdate( "D, d M Y H:i:s" ) . "GMT" );
if($_GET['act']=='upload'){
if($_POST['upload']=='upload'){
$updir ='upload/';
$uploadfile = $uploaddir . basename($_FILES['file']['name']);
$_FILES['file']['name']=strtolower($_FILES['file']['name']);
$tmp_filename=explode(".",$_FILES['file']['name']);
if($tmp_filename[(count($tmp_filename)-1)]=='jpg' || $tmp_filename[(count($tmp_filename)-1)]=='jpeg'){
$up_filename=$updir.md5($_FILES['file']['name'].$_FILES['file']['size']).".".$tmp_filename[(count($tmp_filename)-1)] ;
if(move_uploaded_file($_FILES['file']['tmp_name'],$up_filename)){
list($width, $height, $type, $attr) = getimagesize($up_filename);
$f1="<img src='$up_filename' id='ImageDrag' width='150'>";
echo '<script language="javascript">parent.$("#ImageDragContainer").html("'.$f1.'");</script>';
echo "<script>parent.myform.bigpic.value=''</script>";//修改时候直接替换掉原数据
echo "<script>parent.myform.bigpic.value+='",$up_filename,",",$width,",",$height,"'</script>";
echo "<script>location.href='?act=upload'</script>";exit;
}else{
echo "<script>alert('图片上传失败!');location.href='?act=upload'</script>";exit;
}
}else{
echo "<script>alert('图片上传失败,请注意上传格式，只支持jpg格式图片!');location.href='?act=upload'</script>";exit;
}
}
?>
<body style="padding:0px;margin:0px;">
<div style="margin:0px;padding:0px;font-size:12px;">
<FORM ACTION="?act=upload" METHOD="POST" enctype="multipart/form-data">
<input type="file" name="file" id="file" />
<input type="submit" name="button" id="button" value="上传" />
<
