javascript viewport size

Requirements Analysis: In doing upload pictures, if you do not limit the size of the upload picture, the consequences are very serious. So how can we solve a thorny problem? There are two ways of doing this: 1) Background processing: That is, Ajax Post submitted to the background, upload the picture to the server, and then get the image size to do processing. 2) front desk handling: That is, use

the picture when we edit the service side. And a more flexible way is by placing a section of JS on the page to dynamically get the original size of the picture, dynamically changing the display size of the picture. This will be compatible with the old text of the maximum width of the way, but also when needed to make the picture appear in its original size. Ho

Method 1: Set a fixed value, which is no different from setting the canvas's value in HTML:function () { = +; = Thefunction() { = +; = $;}Method 2: Modify the size with fixed, this way is similar to the first one, need to pass parameters, which is nothing;function (width, height) { = height; = width;}Method 3: The most wanted to record a way to set the size of the canvas according to a

functionCheckimgtype (input) {varThis_ = Document.getelementsbyname (' imgfile ') [0]; varfilepath =This_.value; varExtstart = Filepath.lastindexof (".")); varext =filepath.substring (Extstart, Filepath.length). toUpperCase (); if(Ext! = ". PNG " ext! =". GIF " ext! =". JPG ") {alert ("Image is limited to png,gif,jpg format"); return false; } varFile_size = 0; if($.browser.msie) {varIMG =NewImage (); IMG.SRC=filepath; if(Img.filesize > 0) { if(Img.filesize > 2 * 102

(";"); - +Elementposition[0] = integer.valueof (position[0]); AELEMENTPOSITION[1] = integer.valueof (position[1]); atELEMENTPOSITION[2] = integer.valueof (position[2]); -ELEMENTPOSITION[3] = integer.valueof (position[3]); - - returnelementposition; -}at this point, WebUI Automated functional test Scripts section 029-javascript Example of application in Selenium automation (get element position and

The HTML Tag contains an IMG tag that is not generally known to developers. Let's talk about its attributes first: SRC, DYNSRC, start, ALT, controls, loop, loopdelay, heatace, vspace. ... Some common attributes will not be listed, Here we will talk about the "DYNSRC" attribute: DYNSRC can be used to insert various multimedia files in the format of Wav, Avi, AIFF, AU, MP3, Ra, Ram, etc. . The URL is an audio or video file and its path, which can be a relative or absolute path. Example: In th

JavaScript canvas implementation (paint brush size and color erasers), javascriptcanvas The instance is as follows: The above javaScript canvas implementation (the example of the paint brush size and color erasers) is all the content shared by the editor. I hope to give you a reference and support for the help house.

JavaScript gets the size and position of a window (container) a series of things that are more and easily confusing, here are enumerated and briefly described below: Property Method Description： ClientX the horizontal coordinate of the relative document; ClientY the vertical coordinate of the relative document; OffsetX relative to the horizontal coordinate of the container; The vertical coordinates of the

How to use JavaScript to determine the size of the picture, in fact, as long as a simple function can be written, of course, so how to write a lot of people may not know. found that the use of ASP to determine the size of the picture yaks still complicated, and judged on the judgment, but also the logical display ... Bother. Use

The example in this article describes how JavaScript dynamically modifies the size of pop-up windows. Share to everyone for your reference. Specifically as follows: The following JS code shows how to pop a new window through window.open and then dynamically modify the window size I hope this article will help you with your

Jorwangの small Horn: "Recently busier Ah, temporarily do not update, we play a little bit Oh!" O (∩_∩) o~ " Just see two control page picture width of the method, feel very good very convenient, hereby share to everyone. The first approach is to use CSS to achieve control size: img{ border:0; margin:0; padding:0; max-width:590px; Width:expression (this.widthgt;590?) 590px ": this.width); max-height:590px; Height:expression (this.heightgt;590?) 590

When JavaScript controls the font size settings on the company's official website, the news page will have a function for viewers to adjust their own text size. Therefore, in this idle time, sort out this function: function setFontSize (id,content,params){ var oTarget = document.getElementById(id), content = document.getElementById(content),

is unfair to the users of these browsers. Therefore, I finally chose to dynamically change the image size through JavaScript. This method has good compatibility with various browsers (should few disable JavaScript now ?), If you change the topic, you can flexibly change the maximum size of the article illustrations.

How to dynamically change the layer size using javascript This example describes how to dynamically change the layer size in javascript. Share it with you for your reference. The specific implementation method is as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

I encountered this kind of thing in an article I wrote some time ago. Later, I used the overflow and max-width attributes of CSS to solve the page deformation problem temporarily. The advantage of this method is that it is simple, but the disadvantage is that it will damage some details.For example, overflow: hidden indicates to hide the section beyond the width when the internal element width is greater than the parent frame. This may cause some contents to be suddenly truncated and hidden. Sor

users of these browsers. So, my final choice is to dynamically change the size of the picture through JavaScript. This approach is good for a variety of browsers (it should be very rare for people to disable JavaScript right now?). , if you change the theme, you can also flexibly change the maximum size of the articl

Javascript---browser window viewable area sizeIn IE 9+,chrome, Firefox, Opera,safariThe internal height of the browser window window.innerheight　　The internal width of the browser window window.innerwindthJS scheme that is common in all browsersWidth1 var w =document.documentElement.clientWidth2var w = Document.body.clientWidthHeight1 var w =document.document.Element.clientHeight2var w = Document.body.clientHeightPage sizeGet content height scrollheig

Recently, due to project requirements, if the image is larger than 100X100, it is reduced to 100X100. If the image is smaller than this, the original image size is kept. After research, we found that Javascript code can be used for simple implementation. Javascript code: ﹤script﹥function resizeImage(obj){if(obj.height>100)obj.height=100;if(obj.width>100)

This article illustrates how JavaScript gets the size of a specified object. Share to everyone for your reference. as follows: ? 1 2 3 4 5 6 7 8 9 10 11 function Objectsize (the_object) {/* function to validate the existence ' of each key in the ' object to ' the number of Val ID keys. * * var object_size = 0; For (key in The_object) {if (The_object.hasownproperty (key)) {object_size++;}}

Recently because of the project needs, in the implementation of the picture, if the picture is greater than x 100, then reduce it to x 100, if smaller than this, keep the original size. It has been found that JavaScript code can be used in simple implementation. JavaScript code: Copy Code code as follows: Page code: Copy Code code as follows: