让一个元素看不见的方法

讲述如何使一个元素从看得见到看不见的所有办法

接下来介绍几个可以隐藏元素的方法：

• {display:none;}
• {visibility: hidden;}
• {position: absolute; top: -999em;}
• {position: relative; top: -999em;}
• {position: absolute; visibility: hidden;}
• {height: 0; overflow: hidden;}
• {opacity: 0; filter:Alpha(opacity=0);}
• { position: absolute; opacity: 0; filter:Alpha(opacity=0); }