进度条是网站中常见的一种，今天经过研究外国一个网站的例子，试着用css3来实现进度条：
html代码如下：
css样式：
body{ background:#222; width:360px; margin:0 auto; font:13px 'trebuchet MS',Arial,Helvetica;}
h2, p {text-align: center;color: #fafafa;text-shadow: 0 1px 0 #111; }
a {color: #777;}
.progress-bar{ background-color:#1a1a1a; height:25px; padding:5px; width:350px; margin:70px 0 20px 0;-moz-border-radius:5px; -webkit-border-raidus:5px; border-radius:5px;-moz-box-shadow:0 1px 5px #000 inset, 0 1px 0 #444;-webkit-box-shadow:0 1px 5px #1a1a1a inset,0 1px 0 #444; box-shadow:0 1px 5px inset,0 1px 0 #444; }
.progress-bar span{ display:inline-block; height:100%; background-color:#777; -moz-border-radius:3px;-webkit-border-radius:3px; border-radius:3px; border-radius:3px; box-shadow:0 1px 0 rgba(255,255,255,.5) inset; -webkit-box-shadow:0 1px 0 rgba(255,255,.5) inset; -moz-box-shadow:0 1px 0 rgba(255,255,.5) inset; -webkit-transition:width .4s ease-in-out; -moz-transition:width .4s ease-in-out;-ms-transition:width .4s ease-in-out;transition: width .4s ease-in-out; }主要实现进度条的背景：
触发式加载精美特效企业网站源码1.0.0
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触发式加载精美特效企业网站源码使用jquery实现了很多精美的触发式加载特效，网站首页在随着访客的滚动条滚动过程中会出现很多触发式加载的特殊效果，让这个网站的风格瞬间显得非常的高大上，让你的企业品牌在访客心中留下更深的影响。当然，我们在使用jquery特效的同时也要注意程序对搜索引擎的友好型，所以这一点儿作者也有考虑到，已经尽可能的对js和css脚本进行精简和优化，尽可能的加快网站加载速度，同时也
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.blue span {
background-color: #34c2e3;
}
.orange span{
background-color:#fecf23;
background-image:-webkit-gradient(linear,left top,left bottom,from(#fecf23), to(#fd9215));
background-image:-webkit-linear-gradient(top,#fecf23, #fd9215);
background-image:-moz-linear-gradient(top,#fecf23, #fd9215);
background-image:-ms-linear-gradient(top, #fecf23, #fd9215);
background-image:-o-linear-gradient(top, #fecf23, #fd9215);
background-image: linear-gradient(top, #fecf23, #fd9215);
filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#fecf23', endColorstr='#fd9215'); /* IE6 & IE7 */
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#fecf23', endColorstr='#fd9215')"; /* IE8 */
}
.green span{
background-color:#a5df41;
background-image:-webkit-gradient(linear,left top,left bottom,from(#a5df41), to(#4ca916));
background-image:-webkit-linear-gradient(top,#a5df41, #4ca916);
background-image:-moz-linear-gradient(top,#a5df41, #4ca916);
background-image: -ms-linear-gradient(top, #a5df41, #4ca916);
background-image: -o-linear-gradient(top, #a5df41, #4ca916);
background-image: linear-gradient(top, #a5df41, #4ca916);
filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#a5df41', endColorstr='#4ca916'); /* IE6 & IE7 */
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#a5df41', endColorstr='#4ca916')"; /* IE8 */
}
.stripes span {
-webkit-background-size: 30px 30px;
-moz-background-size: 30px 30px;
background-size: 30px 30px;
background-image: -webkit-gradient(linear, left top, right bottom,
color-stop(.25, rgba(255, 255, 255, .15)), color-stop(.25, transparent),
color-stop(.5, transparent), color-stop(.5, rgba(255, 255, 255, .15)),
color-stop(.75, rgba(255, 255, 255, .15)), color-stop(.75, transparent),
to(transparent));
background-image: -webkit-linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
background-image: -moz-linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
background-image: -ms-linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
background-image: -o-linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
background-image: linear-gradient(135deg, rgba(255, 255, 255, .15) 25%, transparent 25%,
transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%,
transparent 75%, transparent);
-webkit-animation: animate-stripes 3s linear infinite;
-moz-animation: animate-stripes 3s linear infinite;
}
@-webkit-keyframes animate-stripes {
0% {background-position: 0 0;} 100% {background-position: 60px 0;}
}
@-moz-keyframes animate-stripes {
0% {background-position: 0 0;} 100% {background-position: 60px 0;}
}
.shine span {
position: relative;
}
.shine span::after {
content: '';
opacity: 0;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background: #fff;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
border-radius: 3px;
-webkit-animation: animate-shine 2s ease-out infinite;
-moz-animation: animate-shine 2s ease-out infinite;
}
@-webkit-keyframes animate-shine {
0% {opacity: 0; width: 0;}
50% {opacity: .5;}
100% {opacity: 0; width: 95%;}
}
@-moz-keyframes animate-shine {
0% {opacity: 0; width: 0;}
50% {opacity: .5;}
100% {opacity: 0; width: 95%;}
}
/*---------------------------*/
.glow span {
-moz-box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;
-webkit-box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;
box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;
-webkit-animation: animate-glow 1s ease-out infinite;
-moz-animation: animate-glow 1s ease-out infinite;
}
@-webkit-keyframes animate-glow {
0% { -webkit-box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;}
50% { -webkit-box-shadow: 0 5px 5px rgba(255, 255, 255, .3) inset, 0 -5px 5px rgba(255, 255, 255, .3) inset;}
100% { -webkit-box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;}
}
@-moz-keyframes animate-glow {
0% { -moz-box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;}
50% { -moz-box-shadow: 0 5px 5px rgba(255, 255, 255, .3) inset, 0 -5px 5px rgba(255, 255, 255, .3) inset;}
100% { -moz-box-shadow: 0 5px 5px rgba(255, 255, 255, .7) inset, 0 -5px 5px rgba(255, 255, 255, .7) inset;}
}jquey部分：
$(document).ready(function(){
$('.quarter').click(function(){
$(this).parent().prev().children("span").css('width','25%');
});
$('.half').click(function(){
$(this).parent().prev().children('span').css("width",'50%');
});
$('.three-quarters').click(function(){
$(this).parent().prev().children('span').css('width','75%');
});
$('.full').click(function(){
$(this).parent().prev().children('span').css('width','100%');
})
}) 
