combtree

var comboxWithTree = new Ext.form.ComboBox({
		store:new Ext.data.SimpleStore({fields:[],data:[[]]}),
		editable:false,
		shadow:false,
		mode: 'local',
		triggerAction:'all',
		maxHeight: 200,
		tpl: '<tpl for="."><div style="height:200px"><div id="tree1"></div></div></tpl>',
		selectedClass:'',
		onSelect:Ext.emptyFn
	});
	var tree1 = new Ext.tree.TreePanel({
		loader: new Tree.TreeLoader({dataUrl:'get-nodes.php'}),
		border:false,
 		root:new Ext.tree.AsyncTreeNode({text: 'treeRoot',id:'0'})
  	});
  	tree1.on('click',function(node){
  		comboxWithTree.setValue(node.text);
  		comboxWithTree.collapse();
  	});
	comboxWithTree.on('expand',function(){
		tree1.render('tree1');
  	});
	comboxWithTree.render('comboxWithTree');