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Fourth Note:How to make an a tag do not jump:DOCTYPE HTML Public "-//w3c//dtd XHTML 1.1//en" "Http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">HTMLxmlns= "http://www.w3.org/1999/xhtml"Xml:lang= "en">Head> Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /> title>Image Gallerytitle> Head>Body> H1>SnapshotsH1> ul> Li> ahref= "Http://www.baidu.com"title= "A Fireworks display"onclic

ways to Access object properties: Accessing attributes (square brackets) and points (more respected) through variablesArray1 There are two ways to create an instance of an array2 The property of the array length is not read-only, can be modified, the deletion of redundant data, change the General Assembly appears undefined data3 detection is data, generally instanceof is enough, but if the Web page to use more than one frame, there may be an array redefinition, need to use Array.isarray () to d

automatically gets the focus when it reaches a certain lengthFancy gameplay for 6.Add (newoption,reloption); Insert an element into the controlmultiple: Multiple selectionoptions: Htmlcollection of all Remove (Index): Removes the option for a given positionSelectedIndexSize: Number of rows visible in the selection boxYou can use:var newoption=new option ("option text", "option value"); Selectbox.appendchild (newoption);Add an option7.appendChild ()can be used to move items in one list to anothe