Home >Web Front-end >HTML Tutorial >jQuery implementation of verification example of uploaded file size type
jQuery implementation of verification example of uploaded file size type
- 韦小宝Original
- 2017-11-29 09:54:211522browse
File upload has been used in websites for a long time, and using jQuery to upload to users has a better experience. This chapter will talk about jQuery Examples of uploading and verifying file size. Students who want to learn jQuery can take a look!
Go directly to the code:
<!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>The above is an example of jquery's verification of uploaded file size type. Students who are still learning jQuery can study it.
Related recommendations:
jQuery file upload plug-in Uploadify usage guide_jquery
Detailed explanation of the use of JQuery upload plug-in Uploadify
The above is the detailed content of jQuery implementation of verification example of uploaded file size type. For more information, please follow other related articles on the PHP Chinese website!