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昨天在国外的论坛上逛的时候，看到一篇帖子是求助如何利用CSS3实现发光效果的，网友回复中有一个推荐了一款CSS3发光搜索表单，利用CSS3的glow属性，设置0%和100%时的颜色样式，让其渐变，再配合有明显对比的背景，就能模拟出发光的效果了，我把那个CSS3发光表单下载了下来，先来看一下效果图：
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图上的搜索框在被激活的时候会出现闪闪发光的特效。
我们可以在这里查看CSS3发光搜索表单的DEMO演示。
下面我们来一起看看源代码。
HTML代码非常简单，一个文本框和一个提交按钮：
然后重点就是CSS3代码了，首先是对搜索框和搜索按钮的样式进行初始化，为了配合背景能出现发光的效果，我们对它们的样式作了如下设置：
.webdesigntuts-workshop {
background: #151515;
height: 100%;
position: absolute;
text-align: center;
width: 100%;
}
.webdesigntuts-workshop:before,
.webdesigntuts-workshop:after {
content: '';
display: block;
height: 1px;
left: 50%;
margin: 0 0 0 -400px;
position: absolute;
width: 800px;
}
.webdesigntuts-workshop:before {
background: #444;
background: -webkit-linear-gradient(left, #151515, #444, #151515);
background: -moz-linear-gradient(left, #151515, #444, #151515);
background: -o-linear-gradient(left, #151515, #444, #151515);
background: -ms-linear-gradient(left, #151515, #444, #151515);
background: linear-gradient(left, #151515, #444, #151515);
top: 192px;
}
.webdesigntuts-workshop:after {
background: #000;
background: -webkit-linear-gradient(left, #151515, #000, #151515);
background: -moz-linear-gradient(left, #151515, #000, #151515);
background: -o-linear-gradient(left, #151515, #000, #151515);
background: -ms-linear-gradient(left, #151515, #000, #151515);
background: linear-gradient(left, #151515, #000, #151515);
top: 191px;
}
.webdesigntuts-workshop form {
background: #111;
background: -webkit-linear-gradient(#1b1b1b, #111);
background: -moz-linear-gradient(#1b1b1b, #111);
background: -o-linear-gradient(#1b1b1b, #111);
background: -ms-linear-gradient(#1b1b1b, #111);
background: linear-gradient(#1b1b1b, #111);
border: 1px solid #000;
border-radius: 5px;
box-shadow: inset 0 0 0 1px #272727;
display: inline-block;
font-size: 0px;
margin: 150px auto 0;
padding: 20px;
position: relative;
z-index: 1;
}
.webdesigntuts-workshop input {
background: #222;
background: -webkit-linear-gradient(#333, #222);
background: -moz-linear-gradient(#333, #222);
background: -o-linear-gradient(#333, #222);
background: -ms-linear-gradient(#333, #222);
background: linear-gradient(#333, #222);
border: 1px solid #444;
border-radius: 5px 0 0 5px;
box-shadow: 0 2px 0 #000;
color: #888;
display: block;
float: left;
font-family: 'Cabin', helvetica, arial, sans-serif;
font-size: 13px;
font-weight: 400;
height: 40px;
margin: 0;
padding: 0 10px;
text-shadow: 0 -1px 0 #000;
width: 200px;
}
.ie .webdesigntuts-workshop input {
line-height: 40px;
}
.webdesigntuts-workshop input::-webkit-input-placeholder {
color: #888;
}
.webdesigntuts-workshop input:-moz-placeholder {
color: #888;
}
.webdesigntuts-workshop input:focus {
-webkit-animation: glow 800ms ease-out infinite alternate;
-moz-animation: glow 800ms ease-out infinite alternate;
-o-animation: glow 800ms ease-out infinite alternate;
-ms-animation: glow 800ms ease-out infinite alternate;
animation: glow 800ms ease-out infinite alternate;
background: #222922;
background: -webkit-linear-gradient(#333933, #222922);
background: -moz-linear-gradient(#333933, #222922);
background: -o-linear-gradient(#333933, #222922);
background: -ms-linear-gradient(#333933, #222922);
background: linear-gradient(#333933, #222922);
border-color: #393;
box-shadow: 0 0 5px rgba(0,255,0,.2), inset 0 0 5px rgba(0,255,0,.1), 0 2px 0 #000;
color: #efe;
outline: none;
}
.webdesigntuts-workshop input:focus::-webkit-input-placeholder {
color: #efe;
}
.webdesigntuts-workshop input:focus:-moz-placeholder {
color: #efe;
}
.webdesigntuts-workshop button {
background: #222;
background: -webkit-linear-gradient(#333, #222);
background: -moz-linear-gradient(#333, #222);
background: -o-linear-gradient(#333, #222);
background: -ms-linear-gradient(#333, #222);
background: linear-gradient(#333, #222);
-webkit-box-sizing: content-box;
-moz-box-sizing: content-box;
-o-box-sizing: content-box;
-ms-box-sizing: content-box;
box-sizing: content-box;
border: 1px solid #444;
border-left-color: #000;
border-radius: 0 5px 5px 0;
box-shadow: 0 2px 0 #000;
color: #fff;
display: block;
float: left;
font-family: 'Cabin', helvetica, arial, sans-serif;
font-size: 13px;
font-weight: 400;
height: 40px;
line-height: 40px;
margin: 0;
padding: 0;
position: relative;
text-shadow: 0 -1px 0 #000;
width: 80px;
}
.webdesigntuts-workshop button:hover,
.webdesigntuts-workshop button:focus {
background: #292929;
background: -webkit-linear-gradient(#393939, #292929);
background: -moz-linear-gradient(#393939, #292929);
background: -o-linear-gradient(#393939, #292929);
background: -ms-linear-gradient(#393939, #292929);
background: linear-gradient(#393939, #292929);
color: #5f5;
outline: none;
}
.webdesigntuts-workshop button:active {
background: #292929;
background: -webkit-linear-gradient(#393939, #292929);
background: -moz-linear-gradient(#393939, #292929);
background: -o-linear-gradient(#393939, #292929);
background: -ms-linear-gradient(#393939, #292929);
background: linear-gradient(#393939, #292929);
box-shadow: 0 1px 0 #000, inset 1px 0 1px #222;
top: 1px;
}最后我们将这个效果的源码打包一份供大家参考学习。下载地址>>