.tree, .tree * {
    padding: 0;
    margin: 0 0 0 10px;
    list-style: none;
}
 
.tree label[for]::before
{
    content: "\25b6";
    display: inline-block;
    margin: 2px 0 0;
    width: 13px;
    height: 20px;
    vertical-align: top;
    text-align: center;
    color: #e74c3c;
    font-size: 8px;
    line-height: 13px;
}
 
.tree li ul
{
    margin: 0 0 0 9px;
}
 
.tree *
{
    vertical-align: middle;
}
 
.tree
{
    font: normal 18px/16px Arial, Sans-serif;
}
 
.tree li
{
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}
 
.tree input[type="checkbox"]
{
    display: none;
}
 
.tree label
{
    cursor: pointer;
}
 
.tree label[for]::before
{
    -webkit-transform: translatex(-6px);
    -moz-transform: translatex(-6px);
    -ms-transform: translatex(-6px);
    -o-transform: translatex(-6px);
    transform: translatex(-6px);
}
 
.tree input[type="checkbox"][id]:checked ~ label[for]::before
{
    content: "\25bc";
}
 
.tree input[type="checkbox"][id]:not(:checked) ~ ul
{
    display: none;
}

.treeview {
	height:300px; 
	overflow-y:auto
}

#codeholder {
	min-height:200px; 
	max-height:1500px; 
	overflow-y:auto
}