日期:2014-05-16  浏览次数:20379 次

JS高级应用(二)
//检查网页是否存在

function CheckURL(URL)
{
??var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
?? xmlhttp.Open("GET",URL, false);
?? try
?? {??
xmlhttp.Send();??
var result = xmlhttp.status;
?? }
??catch(e) {return(false); }
??if(result==200)
?? {??
return true;
?? }
?? xmlhttp = null;
??return false;
}



//连接数据库

<script language="javascript">
??//用 JavaScript 写服务器端连接数据库的代码示例
??var conn = new ActiveXObject("ADODB.Connection");
?? conn.Open("Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; "
+"Password=; Initial Catalog=pubs");
??var rs = new ActiveXObject("ADODB.Recordset");
??var sql="select * from authors";
?? rs.open(sql, conn);
shtml = "<table width='100%' border=1>";
shtml +="<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>";
??while(!rs.EOF)
?? {
shtml += "<tr><td>" + rs("au_id") + "</td><td>" + rs("au_lname") + "</td><td>" + rs("au_fname") + "</td><td>" + rs("phone") + "</td><td>" + rs("address") + "</td><td>" + rs("city") + "</td><td>" + rs("state") + "</td><td>" + rs("zip") + "</td></tr>";
rs.moveNext;
?? }
?? shtml += "</table>";
?? document.write(shtml);
?? rs.close();??
?? rs = null;??
?? conn.close();??
?? conn =