<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<table id='contentsTable' class='grid' width='100%' border="1">
<thead>
<tr>
<th width='10%' ><input type='button' id='btn_all' value='selall' /></th>
<th width='70%'>aaa</th>
</tr>
</thead>
<tbody>
<tr>
<td width='10%' rowspan='2' align='center'><input type='checkbox' name='chkBox' id='chkBox' /></td>
<td align='center'><input type='text' name='textfield2' id='textfield2' value='xTitle' /></td>
</tr>
<tr>
<td align='center'><textarea name='textarea' id='textarea' cols='45' rows='5'>xConts</textarea></td>
</tr>
<tr>
<td width='10%' rowspan='2' align='center'><div id="divid"><input type='checkbox' name='chkBox' id='chkBox' /></div></td>
<td align='center'><input type='text' name='textfield2' id='textfield2' value='xTitle' /></td>
</tr>
<tr>
<td align='center'><textarea name='textarea' id='textarea' cols='45' rows='5'>xConts</textarea></td>
</tr>
</tbody>
</table>
</body>
</html>
<script type="text/javascript">
<!--
/*
var flip = 0;
$('#btn_all').bind({
click:function(){
if(flip % 2 ==0){
jQuery("input[name=chkBox]").prop("checked",true)
}else{
jQuery("input[name=chkBox]").prop("checked",false)
}
flip++;
alert(flip);
}
});
*/
var flip = 0;
$('#btn_all').click(function(){
if(flip % 2 ==0){
jQuery("input[name=chkBox]").prop("checked",true)
}else{
jQuery("input[name=chkBox]").prop("checked",false)
}
flip++;
alert(flip);
});
//-->
</script>
//jquery API
--------------------- -----------------------------------
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<table id='contentsTable' class='grid' width='100%' border="1">
<thead>
<tr>
<th width='10%' ><input type='button' id='btn_all' value='selall' /></th>
<th width='70%'>aaa</th>
</tr>
</thead>
<tbody>
<tr>
<td width='10%' rowspan='2' align='center'><input type='checkbox' name='chkBox' id='chkBox' /></td>
<td align='center'><input type='text' name='textfield2' id='textfield2' value='xTitle' /></td>
</tr>
<tr>
<td align='center'><textarea name='textarea' id='textarea' cols='45' rows='5'>xConts</textarea></td>
</tr>
<tr>
<td width='10%' rowspan='2' align='center'><div id="divid"><input type='checkbox' name='chkBox' id='chkBox' /></div></td>
<td align='center'><input type='text' name='textfield2' id='textfield2' value='xTitle' /></td>
</tr>
<tr>
<td align='center'><textarea name='textarea' id='textarea' cols='45' rows='5'>xConts</textarea></td>
</tr>
</tbody>
</table>
</body>
</html>
<script type="text/javascript">
<!--
$('#btn_all').click(function(){
$("input[type='checkbox']").prop("checked", function( i, val ) {
alert(i);
return !val;
});
//-->
</script>