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<body>
    <form id="form1" runat="server">
    ÇëÑ¡ÔñÄãµÄ°®ºÃ£º
    <div>
            <input name="Che" type="checkbox" />×ãÇò
            <input name="Che" type="checkbox" />ÀºÇò
            <input name="Che" type="checkbox" />ÉÏÍø
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            <input name="Che" type="checkbox" />¹ä½Ö
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            <input name="Che" type="checkbox" />¿´Êé
    </div>
    <input id="btnquan" type="button" onclick="quan()" value="ȫѡ" />
    <input id="btnfan" type="button" onclick="fan()"  value="·´Ñ¡" />
    </form>
</body>
<script>
//ȫѡµÄ·½·¨ ³¬¼òµ¥
function quanxuan()
{
//»ñµÃ ËùÓеĸ´Ñ¡¿ò
var che=document.getElementByName("Che");
//Ñ­»·ËùÓеĸ´Ñ¡¿ò
for(var i=0;i<che.length;i++)
{
     che[i].checked=true;
}
}
//·´Ñ¡µÄ·½·¨
function fanxuan()
{
   //ͬÑùÒ²ÊÇ»ñµÃËùÓеĸ´Ñ¡¿ò
  var  che=document.getElementByName("Che");
  //ͬÑùforÑ­»·
 for(var i=0;i<che.length;i++)
{
  if(che[i].checked==true)
{
    che[i].checked=false;
}
else
{
 che[i].checked=true;
}
}
}
</script>


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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
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