blocks|key|1901340|text|最好的解决方案是@Alec建议的带有<canvas>标签的解决方案。另一个是非常棘手的，虽然它是更多的跨浏览器兼容，我不知道它对较大的图像有多好。这将是在悬停时对PHP脚本进行AJAX调用，将图像URL作为参数发送，并让PHP脚本返回灰度图像。如果你需要更多的细节，我会为你写一个简短的脚本。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1901341|entityMap^0|I|8|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Best solution is the one suggested by @Alec, with the <code>&lt;canvas&gt;</code> tag. Another one is very tricky and altough it's more cross-browser compatible, I don't know how well it works for larger images. That would be making an AJAX call on hover to a PHP script, sending the image URL as a parameter and having the PHP script return the grayscale image. If you need more details I'll write a short script for you.

blocks|key|3269761|text|作为jQuery的一种替代方案，我认为可以在flash中使用一个简单的flash动画来处理鼠标经过等等，这样就可以在flash中将图像灰度化，而不是隐藏实际的图像源或拥有2张图像。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3269762|这看起来很有价值：http://www.flashcomponents.net/component/as2_luminosity_gray_scale_utility.html|offset|length|3269763|与此组件完全无关...|3269764|entityMap|0|LINK|mutability|MUTABLE|url|http://www.flashcomponents.net/component/as2_luminosity_gray_scale_utility.html^0|0|9|27|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

As an alternative to jQuery but not ajdusting the actual image source or having 2 images, I think its possible to make an image greyscale within flash with a simple flash movie that handles the mouse over etc.

This looks like good value: <a href="http://www.flashcomponents.net/component/as2_luminosity_gray_scale_utility.html" rel="nofollow">http://www.flashcomponents.net/component/as2_luminosity_gray_scale_utility.html</a>

[Not affiliated with this component at all...]

blocks|key|4679917|text|这里有一个使用“一个”图像的解决方案，你会很明显地看到，它实际上是两个图像粘连在一起，我不确定这是否有帮助，希望它能！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4679918|顺便说一句，没有jQuery，只有css|4679919|HTML|4679920|<a+class="myButtonLink"+href="#LinkURL">Leaf</a>|code-block|syntax|javascript|4679921|CSS：|4679922|.myButtonLink+{
++++display:+block;
++++width:+100px;
++++height:+100px;
++++background:+url('/path/to/myImage.png')+bottom;
++++text-indent:+-99999px;
}
.myButtonLink:hover+{
++++background-position:+0+0;
}|4679923|来源：|4679924|http://kyleschaeffer.com/best-practices/pure-css-image-hover/|offset|length|4679925|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|0|0|0|1P|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|14|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|15|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|16|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|17|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|18|8|@]|9|@$S|19|T|1A|1|1B]]|A|$]]|$1|U|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|R]]]]

Here is one solution for using "one" image, as you´ll obviously see, its actually two images stuck together, I´m not sure if this helps, hope it does!

BTW no jQuery, just css

HTML

<pre><code>&lt;a class="myButtonLink" href="#LinkURL"&gt;Leaf&lt;/a&gt;
</code></pre>

CSS:

<pre><code>.myButtonLink {
 display: block;
 width: 100px;
 height: 100px;
 background: url('/path/to/myImage.png') bottom;
 text-indent: -99999px;
}
.myButtonLink:hover {
 background-position: 0 0;
}
</code></pre>

source:

<a href="http://kyleschaeffer.com/best-practices/pure-css-image-hover/" rel="nofollow">http://kyleschaeffer.com/best-practices/pure-css-image-hover/</a>

blocks|key|1151614|text|尝试其中之一(都使用canvas)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1151615|1151616|javascript+image+processing+library+-+desaturate|ordered-list-item|offset|length|1151617|Desaturate+tutorial|1151618|1151619|entityMap|0|LINK|mutability|MUTABLE|url|http://www.pixastic.com/lib/docs/actions/desaturate/|1|http://www.ajaxblender.com/howto-convert-image-to-grayscale-using-javascript.html^0|0|0|0|Z|0|0|0|J|1|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|W|8|@]|9|@$F|X|G|Y|1|Z]]|A|$]]|$1|H|3|I|5|E|7|10|8|@]|9|@$F|11|G|12|1|13]]|A|$]]|$1|J|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]|S|$5|N|O|P|A|$Q|T]]]]

Try one of these (both use canvas):

<ol>
<li><a href="http://www.pixastic.com/lib/docs/actions/desaturate/" rel="nofollow">javascript image processing library</a> - desaturate</li>
<li><a href="http://www.ajaxblender.com/howto-convert-image-to-grayscale-using-javascript.html" rel="nofollow">Desaturate tutorial</a></li>
</ol>

blocks|key|3269876|text|如果Pixastic对你来说有点过分，你可以试试我的简单jQuery插件：jquery-grayscale|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3269877|你可以这样运行它：|3269878|$('img').grayscale();|code-block|syntax|javascript|3269879|它利用了，所以它不能在较旧的浏览器中工作。|3269880|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/josefrichter/jquery-grayscale^0|11|G|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

If Pixastic is overkill for you, you can try my simple jQuery plugin: <a href="https://github.com/josefrichter/jquery-grayscale" rel="nofollow">jquery-grayscale</a>

You run it like:

<pre><code>$('img').grayscale();
</code></pre>

It makes use of &lt;canvas&gt; so it won't work in older browsers.

does anyone know whether there is a way to make an image grayscale on hover - other than by creating 2 separate images and altering the src.

thanks

EDIT - SEMI WORKING CODE...:

<pre><code>&lt;script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery/jquery-1.4.2.min.js"&gt;&lt;/script&gt;
&lt;script type="text/javascript" src="scripts/pixastic-1.custom.js"&gt;&lt;/script&gt;

&lt;script type="text/javascript"&gt;
$(document).ready(function() {

 var img = $(".test img")

 $('.test').hover(function() { 
 $('img', this).pixastic("desaturate");
 }, function() {
 $(this).html(img);
 });

});
&lt;/script&gt;
</code></pre>

and

<pre><code>&lt;div class="test" style="padding:25px; width:200px; background-color:#F96"&gt;
 &lt;img class="pic" src="images/home/mainImage/family_woods.jpg" width="100" height="100" alt="" /&gt;
&lt;/div&gt;
</code></pre>

How can I amend this to work if there is more than one div on the page... like this...

<pre><code>&lt;div class="test" style="padding:25px; width:200px; background-color:#F96"&gt;
 &lt;img class="pic" src="images/home/mainImage/family_woods.jpg" width="100" height="100" alt="" /&gt;
&lt;/div&gt;

&lt;div class="test" style="padding:25px; width:200px; background-color:#F96"&gt;
 &lt;img class="pic" src="images/home/mainImage/another_image.jpg" width="100" height="100" alt="" /&gt;
&lt;/div&gt;
</code></pre>

jquery grayscale on hover

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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有没有人知道除了创建两个独立的图像和改变src之外，是否有一种方法可以使图像在悬停时变得灰度化。谢谢编辑-半工作代码...：<script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery/jquery-1.4.2.min.js"></s...

问悬停时的jquery灰度
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