var tree; 
function buildtree(){
tree = new YAHOO.widget.TreeView("protree"); 
var root = tree.getRoot(); 

var node52 = new YAHOO.widget.TextNode('太阳能热水器', root, false); 

var node56 = new YAHOO.widget.TextNode('皇族系列', node52, false); 

var node57 = new YAHOO.widget.TextNode('皇明系列', node52, false); 

var node60 = new YAHOO.widget.TextNode('美菱系列', node52, false); 

var node78 = new YAHOO.widget.TextNode({ label: '皇族热霸', href:'prolist.asp?subid=78' }, node56, false); 

var node79 = new YAHOO.widget.TextNode({ label: '皇族豪爵', href:'prolist.asp?subid=79' }, node56, false); 

var node80 = new YAHOO.widget.TextNode({ label: '皇族金刚', href:'prolist.asp?subid=80' }, node56, false); 

var node81 = new YAHOO.widget.TextNode({ label: '皇族热尊', href:'prolist.asp?subid=81' }, node56, false); 

var node82 = new YAHOO.widget.TextNode({ label: '皇族热雨', href:'prolist.asp?subid=82' }, node56, false); 

var node83 = new YAHOO.widget.TextNode({ label: '皇族热神', href:'prolist.asp?subid=83' }, node56, false); 

var node85 = new YAHOO.widget.TextNode({ label: '皇明时代', href:'prolist.asp?subid=85' }, node57, false); 

var node86 = new YAHOO.widget.TextNode({ label: '皇明冬冠', href:'prolist.asp?subid=86' }, node57, false); 

var node87 = new YAHOO.widget.TextNode({ label: '皇明冬标', href:'prolist.asp?subid=87' }, node57, false); 

var node88 = new YAHOO.widget.TextNode({ label: '皇明水质宝', href:'prolist.asp?subid=88' }, node57, false); 

var node89 = new YAHOO.widget.TextNode({ label: '美菱极热', href:'prolist.asp?subid=89' }, node60, false); 

var node91 = new YAHOO.widget.TextNode({ label: '美菱健康', href:'prolist.asp?subid=91' }, node60, false); 

var node92 = new YAHOO.widget.TextNode({ label: '美菱惠康', href:'prolist.asp?subid=92' }, node60, false); 

tree.render(); 
tree.expandAll( ) ;
tree.subscribe("clickEvent",function(o){

if(o.node.href&&o.node.children.length==0) window.location=o.node.href

} );
}
YAHOO.util.Event.onDOMReady(buildtree);