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JavaScript ÅжÏcheckboxȡֵÎÊÌâ

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var checkboxs=document.getElementsByTagName("input");
var i;
for(i=0;i<checkboxs.length;i++)
{
if(checkboxs[i].type=='checkbox')
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ÄãµÄµÚÒ»¸öJavascript·þÎñÆ÷¶Ë³ÌÐò(Ò»)

Ô­ÎÄ£ºhttp://www.webreference.com/programming/javascript/rg39/ ×÷ÕߣºRob Gravelle
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<html>
 <head>
  <script type="text/javascript">
   function tree(treethis){
    if (treethis.alt == "+"){
     treethis.alt = "-";
     document.getElementById("bench").style.display="block";
    }else
    {
     treethis.alt = "+";
     document.getElementById("bench").style.display="none"; 
    }
   }
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  <span id="bench" style="display:none;margin-left:19px;">
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    $tree_bentch = array("aaa","bbb","ccc");
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oracleÀï³£ÓÃÃüÁî

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1.forcing log switches
sql> alter system switch logfile;
2.forcing checkpoints
sql> alter system checkpoint;
3.adding online redo log groups
sql> alter database add logfile [group 4]
sql> ('/disk3/log4a.rdo','/disk4/log4b.rdo') size 1m;
4.adding online redo log members
sql> alter database add logfile member
sql> '/disk3/log1b.rdo' to group 1,
sql> '/disk4/log2b.rdo' to group 2;
5.changes the name of the online redo logfile
sql> alter database rename file 'c:/oracle/oradata/oradb/redo01.log'
sql> to 'c:/oracle/oradata/redo01.log';
6.drop online redo log groups
sql> alter database drop logfile group 3;
7.drop online redo log members
sql> alter database drop logfile member 'c:/oracle/oradata/redo01.log';
8.clearing online redo log files
sql> alter database clear [unarchived] logfile 'c:/oracle/log2a.rdo';
9.using logminer analyzing redo logfiles
a. in the init.ora specify utl_file_dir = ' '
......
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