📄 main.html
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<html>
<head>
<style type="text/css">
.leftBar{
background-color : black;
width : 10px;
height : 100%;
cursor : pointer;
}
</style>
<script language="javascript">
var leftBarState = true;
function leftBar(){
if(leftBarState){
var tag = window.parent.document.getElementById("fra2");
tag.cols = "0, *";
leftBarState = false;
}else{
var tag = window.parent.document.getElementById("fra2");
tag.cols = "15%, *";
leftBarState = true;
}
}
</script>
</head>
<body>
<div class="leftBar" onclick="leftBar()"></div>
</body>
</html>
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