CaoMei_Jenny的专栏

 >>>!important#abc{margin:20px!important; /* for Firefox */margin:10px; /* for IE6 */}*+html #abc{margin:10px!important; /* for IE7 */}>>>*#abc{margin:20px; /* for Firefox */  *margin:10px; /* for

先来看一个简单的例子：下面以三个页面分别命名为frame.htm、top.htm、bottom.htm为例来具体说明如何做。frame.htm 由上(top.htm)下(bottom.htm)两个页面组成，代码如下：DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">HTML>HEAD>TITLE>frameTITLE>HEA

只能输入数字：“^[0-9]*$”只能输入n位的数字：“^/d{n}$”只能输入至少n位数字：“^/d{n,}$”只能输入m-n位的数字：“^/d{m,n}$”只能输入零和非零开头的数字：“^(0|[1-9][0-9]*)$”只能输入有两位小数的正实数：“^[0-9]+(.[0-9]{2})?$”只能输入有1-3位小数的正实数：“^[0-9]+(.[0-9]{1,3})?$”只能输入非零的正整数：

In some cases after upgrading to Excel 2007, you may get the following error:The file you are trying to open .xlsx is in a different format than specified by the file extension. verify the file is not