web布局最实用的12条css技巧

web布局最实用的12条css技巧
Rounded corners without images<div?id=”container”>
<b?class=”rtop”>
<b?class=”r1″></b>?<b?class=”r2″></b>?<b?class=”r3″></b>?<b?class=”r4″></b>
</b>
<!content?goes?here?>
<b?class=”rbottom”>
<b?class=”r4″></b>?<b?class=”r3″></b>?<b?class=”r2″></b>?<b?class=”r1″></b>
</b>
</div>

.rtop,?.rbottom{display:block}
.rtop?*,?.rbottom?*{display:?block;?height:?1px;?overflow:?hidden}
.r1{margin:?0?5px}
.r2{margin:?0?3px}
.r3{margin:?0?2px}
.r4{margin:?0?1px;?height:?2px}?

2：Style your order list
Style your order list<ol>
<li>
<p>This?is?line?one</p>
</li>
<li>
<p>Here?is?line?two</p>
</li>
<li>
<p>And?last?line</p>
</li>
</ol>

ol?{
font:?italic?1em?Georgia,?Times,?serif;
color:?#999999;
}
ol?p?{
font:?normal?.8em?Arial,?Helvetica,?sans-serif;
color:?#000000;
}?

3：Tableless forms

效果图——
Tableless forms<form>
<label?for=”name”>Name</label>
<input?id=”name”?name=”name”><br>
<label?for=”address”>Address</label>
<input?id=”address”?name=”address”><br>
<label?for=”city”>City</label>
<input?id=”city”?name=”city”><br>
</form>

label,input?{
display:?block;
width:?150px;
float:?left;
margin-bottom:?10px;
}

label?{
text-align:?right;
width:?75px;
padding-right:?20px;
}

br?{
clear:?left;
}?

4：Double blockquote

效果图——
Double blockquoteblockquote:first-letter?{
background:?url(images/open-quote.gif)?no-repeat?left?top;
padding-left:?18px;
font:?italic?1.4em?Georgia,?“Times?New?Roman”,?Times,?serif;
}?

5：Gradient text effect

效果图——
Double blockquote<h1><span></span>CSS?Gradient?Text</h1>

h1?{
font:?bold?330%/100%?“Lucida?Grande”;
position:?relative;
color:?#464646;
}
h1?span?{
background:?url(gradient.png)?repeat-x;
position:?absolute;
display:?block;
width:?100%;
height:?31px;
}

<![if?lt?IE?7]>
<style>
h1?span?{
background:?none;
filter:?progid:DXImageTransform.Microsoft.AlphaImageLoader(src=’gradient.png’,?sizingMethod=’scale’);
}
</style>

6：Vertical centering with line-height

效果图——
Vertical centering with line-heightdiv{
height:100px;
}
div?*{
margin:0;
}
div?p{
line-height:100px;
}
<p>Content?here</p>?

7：Rounded corners with images

效果图——
Rounded corners with images<div?class=”roundcont”>
<div?class=”roundtop”>
<img?src=”tl.gif”?alt=”"
width=”15″?height=”15″?class=”corner”
style=”display:?none”?/>
</div>

CONTENT

<div?class=”roundbottom”>
<img?src=”bl.gif”?alt=”"
width=”15″?height=”15″?class=”corner”
style=”display:?none”?/>
</div>
</div>

.roundcont?{
width:?250px;
background-color:?#f90;
color:?#fff;
}

.roundcont?p?{
margin:?0?10px;
}

.roundtop?{
background:?url(tr.gif)?no-repeat?top?right;
}

.roundbottom?{
background:?url(br.gif)?no-repeat?top?right;
}

img.corner?{
width:?15px;
height:?15px;
border:?none;
display:?block?!important;
}

8：Multiple class name<img?src="image.gif"?style="border-color: initial;" src="/img/2012/07/01/14402856.gif">
Center horizontally<div?id=”container”></div>
#container?{
margin:0px?auto;
}?

10：CSS Drop Caps

效果图——
CSS Drop Caps<p?class=”introduction”>?This?paragraph?has?the?class?“introduction”.?If?your?browser?supports?the?pseudo-class?“first-letter”,?the?first?letter?will?be?a?drop-cap.?</p>

p.introduction:first-letter?{
font-size?:?300%;
font-weight?:?bold;
float?:?left;
width?:?1em;
}?

11：Prevent line breaks in links, oversized content to brakea{
white-space:nowrap;
}

#main{
overflow:hidden;
}

12：Show firefox scrollbar, remove textarea scrollbar in IEhtml{
overflow:-moz-scrollbars-vertical;
}

textarea{
overflow:auto;
}?