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@weepjp
Created September 6, 2020 18:51
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test chk8
<html>
<head>
<title>test chk8</title>
<script>
function chk( obj,id ) {
  if( !obj.checked ){
   document.getElementById(id).style.display = "none";
  }
  else {
   document.getElementById(id).style.display = "inline";
  }
}
</script>
<style>
#test{
width:300px; border-radius:3px; border:3px solid #888; padding:10px; user-select: all;
}
</style>
</head><body>
<input type="checkbox" id="c1" onclick="chk(this,'a1')" checked="checked" /><label for="c1">1</label><br />
<input type="checkbox" id="c2" onclick="chk(this,'a2')" checked="checked" /><label for="c2">2</label><br />
<input type="checkbox" id="c3" onclick="chk(this,'a3')" checked="checked" /><label for="c3">3</label><br />
<input type="checkbox" id="c4" onclick="chk(this,'a4')" checked="checked" /><label for="c4">4</label><br />
<input type="checkbox" id="c5" onclick="chk(this,'a5')" checked="checked" /><label for="c1">5</label><br />
<input type="checkbox" id="c6" onclick="chk(this,'a6')" checked="checked" /><label for="c2">6</label><br />
<input type="checkbox" id="c7" onclick="chk(this,'a7')" checked="checked" /><label for="c3">7</label><br />
<input type="checkbox" id="c8" onclick="chk(this,'a8')" checked="checked" /><label for="c4">8</label><br />
<div id="test">
<span id="a1">1</span><span id="a2">2</span><span id="a3">3</span><span id="a4">4</span><span id="a5">5</span><span id="a6">6</span><span id="a7">7</span><span id="a8">8</span>
</div>
</body></html>
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