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JavaScript was released by Netscape Communications in 1995 within Netscape Navigator 2.0. Netscape's competitor, Microsoft, released Internet Explorer 3.0 the following year with a reimplementation of JavaScript called JScript. JavaScript and JScript let web developers create web pages with client-side interactivity.
Simply printing (echoing) user input to the browser without checking it first is something that should be avoided in secure forms processors: if a user entered the JavaScript code < script > alert (1)</ script > into the firstname field, the browser would execute the script on the form_handler.php page, just as if it had been coded by the ...
DHTML (Dynamic HTML) allows scripting languages, such as JavaScript, to modify variables and elements in a web page's structure, which in turn affect the look, behavior, and functionality of otherwise "static" HTML content after the page has been fully loaded and during the viewing process.
Where element names the HTML element type, and attribute is the name of the attribute, set to the provided value. The value may be enclosed in single or double quotes, although values consisting of certain characters can be left unquoted in HTML (but not XHTML). [2] [3] Leaving attribute values unquoted is considered unsafe. [4]
Setting or clearing ("unclicking") a checkbox changes the checkbox's state with no other side-effects.Violating this guideline by associating additional actions with the change of state frequently confuses users, because they are used to configuring data in entry controls such as text boxes, radio buttons, and checkboxes and then invoking an action control such as a push button to initiate the ...
Empty elements may enclose no content, for instance, the < br /> tag or the inline < img > tag. The name of an HTML element is the name used in the tags. The end tag's name is preceded by a slash character, /, and that in empty elements the end tag is neither required nor allowed. If attributes are not mentioned, default values are used in each ...
Note that the element's value is found before the (separate) end tag, not in the element itself. The element itself may have a number of attributes set (NAME = "IAMAPROPERTY"). If the element in question could be considered a property (CUSTOMER_NAME) of another entity (let's say CUSTOMER), the element can have zero or more attributes ...
code point name ⍻ u+237b: not check mark ☐ u+2610: ballot box ☑: u+2611: ballot box with check : u+2705: white heavy check mark u+2713: check mark : u+2714: heavy check mark 𐄂 u+10102: aegean check mark 𝤿 u+1d93f: signwriting movement-wallplane check small 𝥀 u+1d940: signwriting movement-wallplane check medium 𝥁 u+1d941