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How to Trigger Event of Other Elements?

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<!doctype html><html><head><meta charset="utf-8"><title>Untitled Document</title><style type="text/css">.sectionseparator {	background-image:url(/asset/image/accordion_icon_sprite.png);	background-position:0px 0px;}.sectionseparator:hover {	background-image:url(/asset/image/accordion_icon_sprite.png);	background-position:0px 101px;}.sectionseparator.open {	background-image:url(/asset/image/accordion_icon_sprite.png);	background-position:0px 27px;}.sectionseparator.open:hover {	background-image:url(/asset/image/accordion_icon_sprite.png);	background-position:0px 64px;}</style><script language="javascript" type="text/javascript">function imgHover(o){        //what script shoud I put here??};function showHideInfo(o){        //Don't worry about this. Already done.};</script></head><body><a id="section-spg" href="#" onClick="showHideInfo(this);" onMouseOver="imgHover(this);"><img id="section-spg-img" src="/asset/image/invis.gif" width="27" height="27" class="sectionseparator" style=" position:absolute;margin-top:5px;"> <div style="display:inline-block; position: relative; top:6px; left:35px;">SPG</div></a><div id="spg-info">SPG Info</div></body></html>

I want background image of 'section-spg-img' changed as 'sectionseparator:hover' when I hover mouse in any region within 'section-spg'. I've searching and try every event method. Either I'm stupid enough and failed or I'm not understand anything about event.

 

Image sprite contain {+,hovered +, -, hovered -}.

showHideInfo() change either + or - of the image and show or hide 'spg-info'. (success)

imgHover() change either hovered + or hovered - of the image. (failed)

 

Example : http://www.microsoft.com/en-us/download/details.aspx?id=30653 (Detail, System Requirement, etc...)

 

I don't wanna use jQuery.

Thank you.

Edited by Fiq

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Simpler example maybe? We don't have your images.

 

Try...

<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"/><title>title</title><script>window.onerror = function(a, b, c, d){alert('Javascript Error:n'+a+'nURL: '+b+'nLine: '+c+'  Column: '+d);return true;}</script><style>#div1{  background-color: gray;  width:100px;  height:100px;  border:1px solid #bbb;}#div1:hover{  background-color: pink;}#div2{  width:30px;  height:30px;  border:1px solid #bbb;}.div2i{background-color: #ccc;}.div2h{background-color: orange;}.div2c{background-color: yellow;}</style><script>function showHover(o){   document.getElementById('debug').innerHTML += '[hover:' + o.id + '] ';   document.getElementById('div2').className = 'div2h';}function showClick(o){   document.getElementById('debug').innerHTML += '[click:' + o.id + '] ';   document.getElementById('div2').className = 'div2c';}</script></head><body><div id="div1" onClick="showClick(this);" onMouseOver="showHover(this);"><div id="div2" class="div2i"></div></div><hr/><div id="debug"></div></body></html>

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You can't add a pseudo class like :hover to an element using Javascript. What you can do is give the hover rules an additional class name and then add and remove that class to the other elements.

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