直接上代码咯：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="jquery1.8/jquery-1.8.0.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#myFile").change(function () {
var filepath = $("input[name='myFile']").val();
var extStart = filepath.lastIndexOf(".");
var ext = filepath.substring(extStart, filepath.length).toUpperCase();
if (ext != ".BMP" && ext != ".PNG" && ext != ".GIF" && ext != ".JPG" && ext != ".JPEG") {
alert("图片限于bmp,png,gif,jpeg,jpg格式");
$("#fileType").text("")
$("#fileSize").text("");
return false;
} else { $("#fileType").text(ext) }
var file_size = 0;
if ($.browser.msie) {
var img = new Image();
img.src = filepath;
while (true) {
if (img.fileSize > 0) {
if (img.fileSize > 3 * 1024 * 1024) {
alert("图片不大于100MB。");
} else {
var num03 = img.fileSize / 1024;
num04 = num03.toFixed(2)
$("#fileSize").text(num04 + "KB");
}
break;
}
}
} else {
file_size = this.files[0].size;
var size = file_size / 1024;
if (size > 10240) {
alert("上传的图片大小不能超过10M！");
} else {
var num01 = file_size / 1024;
num02 = num01.toFixed(2);
$("#fileSize").text(num02 + " KB");
}
}
return true;
});
});
</script>
<title>无标题文档</title>
</head>
<body>
<table width="500" cellspacing="0" cellpadding="0">
<tr>
<td width="72" id="fileType">
</td>
<td width="242">
<input type="file" name="myFile" id="myFile" />
</td>
<td width="184" id="fileSize" class="fileSize">
</td>
</tr>
</table>
</body>
</html>下载本文