Refere to HTML-DOM-Object with jQuery


for HTML-Tag`s


for all elemet`s in the HTML - document


for HTML-Tag with an ID-attribute

$("") vs. document. getElementById()


referes to jquery-Object


referes to a HTML-Dom-Object

With the HTML-DOM-Object you can only use "normal" Javascript. With the jQuery-Object you can use normal javascript but you can also use the hole jQuery-Framework with all methods implemented in the Framework

Which Error-Message appears when jQuery is not "installed" ?

$ is not defined

If this Error- Message appears, check if the jquery .js File is implemented in your html head-Tag