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CSS讓div背景透明，CSSdiv背景透明
div背景透明樣式：
樣式代碼：
.alert{filter:alpha(opacity=100); /* IE */ -moz-opacity:1.0; /* Moz + FF */
opacity: 1.0; height:300px; width:500px; background:#ccc; left:50%; top:50%;margin-top:-150px;margin-left:-250px;position:absolute;z-index:99; text-align:center; padding:20px;}
使用方法：
<div class=”alert”>
背景透明
</div>
html代碼：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>100素材網</title><style type="text/css">.alert{filter:alpha(opacity=100); /* IE */ -moz-opacity:1.0; /* Moz + FF */ opacity: 1.0; height:300px; width:500px; background:#ccc; left:50%; top:50%;margin-top:-150px;margin-left:-250px;position:absolute;z-index:99; text-align:center; padding:20px}</style></head><body><div class="alert">100素材網</div></body></html>
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