Home > Developer > JavaScript

Javascript code for uploading and previewing Images

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

The src with the alphaimageloader filter is the main character. It specifies the background image with an absolute or relative url address. If this parameter is ignored, the filter will not work.
Copy codeThe Code is as follows:
<! Doctype html public "-// w3c // dtd xhtml 1.0 transitional // en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<Html xmlns = "http://www.3ppt.com/">
<Head>
<Meta http-equiv = "content-type" content = "text/html; charset = gb2312"/>
<Title> </title>
<Style type = "text/css tutorial">
# Picshow
{
Filter: progid: dximagetransform. microsoft. alphaimageloader (sizingmethod = scale );
Width: 88px;
Height: 125px;
}
</Style>
<Script type = "text/Webpage effects" language = "javascript">
<! --
Function upimg (imgfile)
{
Var picshow = document. getelementbyid ("picshow ");
Picshow. filters. item ("dximagetransform. microsoft. alphaimageloader"). src = imgfile. value;
Picshow. style. width = "88px ";
Picshow. style. height = "125px ";
}
-->
</Script>
</Head>
<Body>
<Div id = "picshow"> </div>
<P> select an image: <input type = "file" size = "20" onchange = "upimg (this);"/> </p>
</Body>
</Html>

Instance 2: compatible with ie6, ie7, ie8, and firefox.
Copy codeThe Code is as follows:
<! 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" xml: lang = "en" lang = "en">
<Head>
<Meta http-equiv = "content-type" content = "text/html; charset = UTF-8"/>
<Script>
Var picpath;
Var image;
// Preview picture
Function preview ()
{
Document. getelementbyid ('preview'). style. display = 'none ';
// The following code is used to obtain the image size so that the image can be normally displayed in ie.
Document. getelementbyid ('box'). innerhtml
= " ";
}
// Show view button
Function buttonshow ()
{
/*
This is used to solve preview failure caused by image loading delay.
For a brief description, when the src attribute of the image object changes, javascript will re-load the image content to the image,
This usually takes some time. If you want to display the image before loading, it will cause an error.
The preview button is displayed only after the image is loaded.
Here I am still confused. The preview effect in ie7 occasionally fails.
*/
If (image. width = 0 | image. height = 0 ){
Settimeout (FIG, 1000 );
} Else {
Document. getelementbyid ('preview'). style. display = 'block ';
}
}
Function loadimage (ele ){
Picpath = getpath (ele );
Image = new image ();
Image. src = picpath;
Settimeout (FIG, 1000 );
}
Function getpath (obj)
{
If (obj)
{
// Ie
If (window. navigator. useragent. indexof ("msie")> = 1)
{
Obj. select ();
// Obtain the local path of the image in ie
Return document. selection. createrange (). text;
}
// Firefox
Else if (window. navigator. useragent. indexof ("firefox")> = 1)
{
If (obj. files)
{
// The image data obtained in firefox
Return obj. files. item (0). getasdataurl ();
}
Return obj. value;
}
Return obj. value;
}
}
</Script>
</Head>
<Body>
<Input type = "file" name = "pic" id = "pic" onchange = 'loadimage (this) '/>
<Input id = 'preview' type = 'button 'value = 'preview' style = 'display: none; 'onclick = 'preview (); '>
<Div id = 'box'> </div>
</Body>
</Html>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
downloading and uploading files check image size javascript before uploading time and date javascript code get file size in javascript before uploading javascript code for select option what is uploading and downloading on computer no enough space for uploading file
Related Article
The difference between single and double quotes in JavaScript...
The html space symbol nbsp; ensp; emsp; introduces and implem...
Ajax and 302 response code Testing
Ajax and 302 response code test_javascript-js tutorial

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More