javascript viewport size

This example describes how JavaScript detects the size of uploaded files. Share to everyone for your reference. Specifically as follows: Through the JS client code to limit the size of the user upload file, but the client's authentication is only auxiliary, the server side must also do verification The wants this article to help you with your

This article mainly describes how JavaScript gets the original size of the picture in the width of the example, the need for friends can refer to the Page of the IMG element, want to get its original size, take the width as an example may be the first thought is width, as follows The code is as follows: O1twaam26gomcgyaaoys716.jpg "> The Getwh method

Copy Code code as follows: The FileSize attribute of JavaScript and IMG itself under IE is applied. In addition, IMG has several other attributes, such as Filecreateddate, Filemodifieddate, FileSize, fileupdateddate, filters, we can use these properties to get part of the picture file information, such as file size , we use the file form with the IMG tag to determine whether the

How to get form data:1. Note The ID of the form2. Use document.getElementById ("num"). value to get values3. It is important to note that you now get a string type that can be used with alert (typeof (NUM)) to get the data type4. Use the parseint function to convert a string type to an int type, and then determine5.!!!!!!!!!!!!! Note to write. Value, I forgot again, find the bug again ...DOCTYPE HTML>HTML>Head> MetaCharSet= "UTF-8"> title>Jstitle> Scripttype= "Text/

This article illustrates how JavaScript gets the size of a specified object. Share to everyone for your reference. Specifically as follows: function Objectsize (the_object) {/* function to validate the existence of the ' each key in the ' object to get the Numbe R of valid keys. * * var object_size = 0; For (key in The_object) { if (The_object.hasownproperty (key)) { object_size++ } } return

This article illustrates how JavaScript implements the mouse drag to change the size of the layer. Share to everyone for your reference. The implementation method is as follows: The wants this article to help you with your JavaScript programming.

var StartDate = $ ("#StartTime ). Val (); var endDate = $ ("#EndTime ). Val (); var start = Date.parse (new Date ( Startdate.replace (/-|\/|\,/g, "\ \" var end = Date.parse (new Date ( Enddate.replace (/-|\/|\,/g, "\ \" if (Start > end) {alert ( "End time cannot be before the start time!) "); return false ; }How JavaScript determines the time size