Sample: dhtmlxTree Mixed checkboxes dhtmlxTree main page
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Mixed two state checkboxes

Check item
UnCheck item
Show item's checkbox
Hide item's checkbox
Disable checkbox
Enable checkbox
Check branch
UnCheck branch
Get list of checked

Mixed three state checkboxes

Check item
UnCheck item
Show item's checkbox
Hide item's checkbox
Disable checkbox
Enable checkbox
Get list of checked

 
<div id="treeboxbox_tree" style="width:200;height:200"></div>
<script>
 
            tree=new dhtmlXTreeObject("treeboxbox_tree","100%","100%",0);
            tree.setImagePath("../imgs/");
            //enable checkboxes
            tree.enableCheckBoxes(1);
            tree.loadXML("tree.xml");
            
            ....
            tree.showItemCheckbox(id,false); //hide checkbox            
            tree.showItemCheckbox(id,true);  //show checkbox
</script>
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