Method 1
<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<zk>
<window title="new page title" border="normal">
New Content Here!
<button label="click me" href="../main/Practice.zul"/>
</window>
</zk>
<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<zk>
<window title="new page title" border="normal">
New Content Here!
<button label="click me" href="../main/Practice.zul"/>
</window>
</zk>
Method 2
<zk>
<window id="mainwin" border="normal" title="hello" xmlns:c="client">
<button label="Practice">
<attribute name="onClick">
Executions.createComponents("../main/Practice.zul",mainwin,null);
</attribute>
</button>
</window>
</z