function init() {
		
		
		var tree = new YAHOO.widget.TreeView("treediv");
		
		
		var root = tree.getRoot();
		
		
		    var ahmedDocsRootOne = new YAHOO.widget.TextNode("初中物理", root, true);
            
            ahmedDocs = new YAHOO.widget.TextNode("第一章　声现象", ahmedDocsRootOne, true);
            
        	myobj = { label: "一、声音的产生与传播", id:"111" } ; 
			
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
 	        myobj = { label: "二、我们怎么听到声音", id:"112" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            myobj = { label: "三、声音的特性", id:"113" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            myobj = { label: "四、噪声的危害和控制 ", id:"114" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            myobj = { label: "五、声的利用 ", id:"115" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
			myobj = { label: "六、声现象单元测试", id:"11" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
           
            
            
            ahmedDocs = new YAHOO.widget.TextNode("第二章 光现象", ahmedDocsRootOne, true);
            myobj = { label: "一、光的传播", id:"121" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
 	        myobj = { label: "二、光的反射", id:"122" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            myobj = { label: "三、平面镜成像 ", id:"123" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            myobj = { label: "四、光的折射 ", id:"124" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            myobj = { label: "五、光的色散  ", id:"125" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  

			myobj = { label: "六、看不见的光 ", id:"126" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);

            myobj = { label: "七、光现象单元测试", id:"12" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode( myobj , ahmedDocs, false);

            
            
　　
　　
　　
　　
　　
 
            ahmedDocs = new YAHOO.widget.TextNode("第三章　透镜及其应用", ahmedDocsRootOne, true);
            
            myobj = { label: "一、透镜 ", id:"131" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、生活中透镜 ", id:"132" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、探究凸透镜成像的规律 ", id:"133" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、眼睛和眼镜 ", id:"134" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "五、显微镜和望远镜 ", id:"135" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
			
			myobj = { label: "六、透镜及其应用单元测试", id:"13" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);	
			
            
            
            
            ahmedDocs = new YAHOO.widget.TextNode("第四章　物态变化", ahmedDocsRootOne, true);
            myobj = { label: "一、温度计  ", id:"141" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、熔化和凝固 ", id:"142" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、汽化和液化 ", id:"143" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、升华和凝华 ", id:"144" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
			myobj = { label: "五、物态变化单元测试", id:"14" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            
            
            
            ahmedDocs = new YAHOO.widget.TextNode("第五章　电流和电路 ", ahmedDocsRootOne, true);
            myobj = { label: "一、电荷  ", id:"151" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、电流和电路  ", id:"152" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、串联和并联 ", id:"153" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、电流的强弱  ", id:"154" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
			myobj = { label: "五、探究串、并联电路中电流的规律", id:"155" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            
			myobj = { label: "六、电流和电路单元测试", id:"15" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            
            
            
            
            ahmedDocs = new YAHOO.widget.TextNode("第六章 电压　电阻  ", ahmedDocsRootOne, true);
            myobj = { label: "一、电压  ", id:"161" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、探究串、并联电路电压的规律   ", id:"162" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、电阻 ", id:"163" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、变阻器 ", id:"164" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、电压电阻单元测试", id:"16" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            
            
            
            
            ahmedDocs = new YAHOO.widget.TextNode("第七章　欧姆定律 ", ahmedDocsRootOne, true);
            myobj = { label: "一、探究电阻上的电流跟两端电压的关系 ", id:"171" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、欧姆定律及其应用 ", id:"172" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、测量小灯泡的电阻 ", id:"173" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、欧姆定律和安全用电 ", id:"174" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、欧姆定律单元测试", id:"17" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);

　　 

             ahmedDocs = new YAHOO.widget.TextNode("第八章　电功率", ahmedDocsRootOne, true);
            myobj = { label: "一、电能 ", id:"181" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、电功率 ", id:"182" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、测量小灯泡的电功率 ", id:"183" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、电与热 ", id:"184" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、电功率和安全用电 ", id:"185" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            myobj = { label: "六、生活用电常识", id:"186" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
			myobj = { label: "七、电功率单元测试", id:"18" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			

　　 
	
			 ahmedDocs = new YAHOO.widget.TextNode("第九章　电与磁", ahmedDocsRootOne, true);
            myobj = { label: "一、磁现象  ", id:"191" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、磁场 ", id:"192" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、电生磁 ", id:"193" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、电磁铁", id:"194" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、电磁继电器　扬声器 ", id:"195" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            myobj = { label: "六、电动机", id:"196" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
			myobj = { label: "七、磁生电 ", id:"197" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
			myobj = { label: "八、电与磁单元测试", id:"19" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			

            
			
			ahmedDocs = new YAHOO.widget.TextNode(" 第十章　信息的传递 ", ahmedDocsRootOne, true);
            myobj = { label: "一、现代顺风耳──电话 ", id:"205" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、电磁波的海洋  ", id:"206" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、广播、电视和移动通信  ", id:"207" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、越来越宽的信息之路 ", id:"208" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、信息的传递单元测试 ", id:"20" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            
            
            
            
            
            ahmedDocs = new YAHOO.widget.TextNode(" 第十一章　多彩的物质世界", ahmedDocsRootOne, true);
            myobj = { label: "一、宇宙和微观世界", id:"211" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、质量  ", id:"212" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、密度 ", id:"213" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、测量物质的密度 ", id:"214" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、密度与社会生活 ", id:"215" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            myobj = { label: "六、多彩的物质世界单元测试 ", id:"21" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
  
            ahmedDocs = new YAHOO.widget.TextNode(" 第十二章　运动和力 ", ahmedDocsRootOne, true);
            myobj = { label: "一、运动的描述", id:"221" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、运动的快慢  ", id:"222" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、长度、时间及其测量 ", id:"223" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、力", id:"224" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、牛顿第一定律  ", id:"225" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			 
			myobj = { label: "六、二力平衡 ", id:"226" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			

			myobj = { label: "七、运动和力单元测试", id:"22" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
            
            
            
            
            ahmedDocs = new YAHOO.widget.TextNode("第十三章　力和机械", ahmedDocsRootOne, true);
            myobj = { label: "一、弹力　弹簧测力计 ", id:"231" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、重力 ", id:"232" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、摩擦力", id:"233" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、杠杆 ", id:"234" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、其他简单机械  ", id:"235" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			 

			myobj = { label: "六、力和机械单元测试", id:"23" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);

       
            ahmedDocs = new YAHOO.widget.TextNode(" 第十四章　压强和浮力 ", ahmedDocsRootOne, true);
            myobj = { label: "一、压强 ", id:"241" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "　二、液体的压强 ", id:"242" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、大气压强 ", id:"243" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、流体压强与流速的关系 ", id:"244" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、浮力  ", id:"245" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			 
			myobj = { label: "六、浮力的利用 ", id:"246" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			
			myobj = { label: "七、压强和浮力单元测试", id:"24" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
                

　

            ahmedDocs = new YAHOO.widget.TextNode(" 第十五章　功和机械能 ", ahmedDocsRootOne, true);
            myobj = { label: "一、功 ", id:"251" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、机械效率", id:"252" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、功率  ", id:"253" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、动能和势能 ", id:"254" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、机械能及其转化 ", id:"255" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			 
			myobj = { label: "六、功和机械能单元测试", id:"25" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);


            ahmedDocs = new YAHOO.widget.TextNode("第十六章　热和能  ", ahmedDocsRootOne, true);
            myobj = { label: "一、分子热运动", id:"261" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、内能 ", id:"262" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、比热容", id:"263" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、热机", id:"264" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、能量的转化和守恒 ", id:"265" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			 
			myobj = { label: "六、热和能单元测试", id:"26" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			

            ahmedDocs = new YAHOO.widget.TextNode(" 第十七章　能源与可持续发展 ", ahmedDocsRootOne, true);
            myobj = { label: "一、能源家族 ", id:"271" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
           	
 	        myobj = { label: "二、核能 ", id:"272" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
            
            myobj = { label: "三、太阳能 ", id:"273" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
            
            myobj = { label: "四、能源革命 ", id:"274" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);  
             
			myobj = { label: "五、能源与可持续发展  ", id:"275" } ; 
            var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);
			 
			myobj = { label: "六、能源与可持续发展单元测试", id:"27" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, ahmedDocs, false);

		
		var sushDocs = new YAHOO.widget.TextNode("其他", root, true);
		
		myobj = { label: "八年级上", id:"5" } ; 
		var ahmedMsWord = new YAHOO.widget.TextNode(myobj, sushDocs, false);
			
			
			myobj = { label: "八年级下", id:"6" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj , sushDocs, false);
			
			
				myobj = { label: "九年级上", id:"7" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj , sushDocs, false);
			
			
				myobj = { label: "九年级下", id:"8" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, sushDocs, false);
			
			
			
			myobj = { label: "各地中考", id:"9" } ; 
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, sushDocs, false);
			
			
				myobj = { label: "物理竞赛", id:"10" } ;
			var ahmedMsWord = new YAHOO.widget.TextNode(myobj, sushDocs, false);
			
			
			
            tree.subscribe("labelClick", function(node) { 
            
	           if(node.data.id)
              {
                  currentlessonid = node.data.id;
            }
              else
              {
                 currentlessonid =0
            } 
            if($('inputtext'))
            {
              if(node.data.label)
              {
                 $('inputtext').value  = node.data.label;
              }
              else
              {
                 $('inputtext').value  = "" ;
              }
            }
			else
			{
			   getpage(1);
			}
	       }); 
	
	
	 

	
		tree.draw();
        tree.collapseAll();
        ahmedDocsRootOne.expand(); 
	}
	//Add an onDOMReady handler to build the tree when the document is ready
     //   YAHOO.util.Event.onDOMReady(page_load);
     function begin() {
	  setTimeout("init()",2000); 

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