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JavaScript - How To Precache Imgs?
Hi all.
I would like to precache my menu imgs cos of rollover delay. Tried this way, Is it right? Code: <script type="text/javascript">
var offImgArray = new array();
offImgArray["imgname2"].src ="images/navbtn/offbtn_2.gif";
offImgArray["imgname3"].src ="images/navbtn/offbtn_3.gif";
offImgArray["imgname4"].src ="images/navbtn/offbtn_4.gif";
offImgArray["imgname5"].src ="images/navbtn/offbtn_5.gif";
// same for on images?
// code here
function linkOver(link)
{
var image = link.getElementsByTagName("IMG")[0];
image.src = image.src.replace("offbtn_2.gif","onbtn_2.gif");
image.src = image.src.replace("offbtn_3.gif","onbtn_3.gif");
image.src = image.src.replace("offbtn_4.gif","onbtn_4.gif");
image.src = image.src.replace("offbtn_5.gif","onbtn_5.gif");
// other imgs here
}
Edit. I'm missing smthg cos I get error array is nul etc low tech Similar TutorialsIn firefox Images 1 2 & 3 won't swap and in IE the img src(not PhotoBig) wont show pics 1 2 & 3 any reason why? I'm new to javascript so its probably a dumb reason? Please help if you can. Code: <script type="text/javascript">
function update(url,index,isSuper) {
document['PhotoBig'].src=url;
}
</script>
Code: <img src="graphics/travel/big/keysfish1.gif" name="PhotoBig" style="border:1px solid black">
<table>
<tr>
<td>
<a onMouseOver="update('graphics/travel/big/keysfish1.gif', 0, false); return false;">
<img src="graphics/travel/thumbnails/keysfish1.gif" style="border:1px solid black">
</a>
</td>
<td>
<a onMouseOver="update('graphics/travel/big/keysfish2.gif', 1, true); return false;">
<img src="graphics/travel/thumbnails/keyfish2.gif" style="border:1px solid black">
</a>
</td>
<td>
<a onMouseOver="update('graphics/travel/big/keysfish3.gif', 2, true); return false;">
<img src="graphics/travel/thumbnails/keyfish3.gif" style="border:1px solid black">
</a>
</td><td>
<a onMouseOver="update('graphics/travel/big/keysfish4.gif', 3, true); return false;">
<img src="graphics/travel/thumbnails/keyfish4.gif" style="border:1px solid black">
</a>
</td>
</tr>
<tr>
<td colspan="4" style="text-align: center; font: .8em 'Comic Sans MS', Arial;">
Move the cursor over the images/picture you wish to preview.
</td>
</tr>
<tr>
<td>
<a onMouseOver="update('graphics/travel/big/keysturtle1.gif', 4, true); return false;">
<img src="graphics/travel/thumbnails/keysturtle1.gif" style="border:1px solid black">
</a>
</td><td>
<a onMouseOver="update('graphics/travel/big/tyleranthony.gif', 5, true); return false;">
<img src="graphics/travel/thumbnails/tyleranthony.gif" style="border:1px solid black">
</a>
</td>
<td>
<a onMouseOver="update('graphics/travel/big/uwdiver1.gif', 6, true); return false;">
<img src="graphics/travel/thumbnails/uwdiver1.gif" style="border:1px solid black">
</a>
</td><td>
<a onMouseOver="update('graphics/travel/big/uwlou.gif', 7, true); return false;">
<img src="graphics/travel/thumbnails/uwlou.gif" style="border:1px solid black">
</a>
</td>
</tr>
</table>
Hi all If I pre-cache imgs like this ... (10 in all) Code: <head> <script type="text/javascript"> PreImage1= new Image(width,height); PreImage1.src = "images/navbtn/onbtn_1.gif"; PreImage2 = new Image(width,height); PreImage2.src = "images/navbtn/onbtn_2.gif"; PreImage3= new Image(width,height); PreImage3.src = "images/navbtn/offbtn_1.gif"; PreImage4 = new Image(width,height); PreImage4.src = "images/navbtn/offbtn_2.gif"; </script> Will imgs be read from cache if I then do this?... or have I missed smthg? Code: <body> <img src="images/navbtn/offbtn_1.gif" onmouseover=this.src="images/navbtn/onbtn_1.gif" onmouseout=this.src="images/navbtn/offbtn_1.gif" alt="" /> </div> low tech Hi all Is there a way to get the image(s) to load into the table after the page has loaded instead of the way I have it now? I have 4 tabs, but I would like the imgs in tabs 2,3,4 to load after page load. Example of how the tabs look. Code: <div class="tabbertab">
<h2>Australia_____</h2>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFCC">
<caption class="highlight_Red">澳洲 Australia
</caption>
<tr>
<td><a href="pages/promotion.html#aus_ACE" rel="nofollow" target="_blank"><img src="pages/images/Pics/AUS/ace.jpg" alt="ACE / ATTC" width="110" height="69" border="0" align="left" class="ozimg_L"/> ...a few more images etc
the other tabs look the same. LT |
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