When we develop something on JavaScript,sometimes we use the next constructions:

function insert_tree_base(data) {
eval("window.items=" + data + ";");
if (items && (items.length > 0)) {
var s = "<table cellspacing='0' cellpadding='5' class='tree'>";
for (var i=0; i < items.length; i++)

{ s = s + "<tr><td valign='top' align='left'>" + window.insert_tree_build(window.items[i], 0) + "</td></tr>"; }

s = s + "</table>";
jQuery("#treeFragment").append(s);
}

And in VPE we don't have a html highlighting inside s = s + "<tr><td valign='top' align='left'>" + window.insert_tree_build(window.items[i], 0) + "</td></tr>";