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<html>
<mce:script type="text/javascript"><!--
function checkedAll(checked)
{
var ckbArray=document.getElementsByName('ckb');
for(var i=0,len=ckbArray.length;i<len;i++)
{
ckbArray[i].checked=checked;
}
}
function clickbutton()
{
var ckbArray=document.getElementsByName('ckb');
for(var i=0,len=ckbArray.length;i<len;i++)
{
if (ckbArray[i].checked == true)
{
ckbArray[i].checked = false;
}
else
{
ckbArray[i].checked = true;
}
}
}
// --></mce:script>
<body>
<input type='checkbox' onclick='checkedAll(this.checked);' />
<input type='button' value ='check' onclick="clickbutton();">
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<input type='checkbox' name='ckb'/>2
<input type='checkbox' name='ckb'/>3
<input type='checkbox' name='ckb'/>4
<input type='checkbox' name='ckb'/>5
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</body>
</html>
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