摘要： 图：HTML代码：<div class="pre-wrap"> <div class="pre"> <div class="pre1"></div> <div class="pre2"></div> </div></div>CSS代码：.pre-wrap { width: 200px; height: 120px; margin: 50px auto 0; border: 2px solid #F00; border-r 阅读全文

摘要： all IE{property:value\9;}gte IE 8{property:value\0;}lte IE 7{*property:value;}IE 8/9{property:value\0;}IE 9{property:value\9\0;}IE 7{+property:value;}IE 6{_property:value;}not IE{property:value;}lte：就是Less than or equal to的简写，也就是小于或等于的意思。lt ：就是Less than的简写，也就是小于的意思。gte：就是Greater than or equal to的简写， 阅读全文