function tdclick(urlname)
			{
					menuform.action = urlname;
				    menuform.target = "main";
                    
					//去掉所有没选中的tr为
					var rows=document.getElementsByTagName("tr");
					for(var i=0;i<rows.length;i++){
                           rows[i].className="menuname";
					}
					var tmp = event.srcElement;
					while (tmp && tmp.tagName && tmp.tagName.toLowerCase()!='tr') {
						tmp = tmp.parentNode;
					}
				//	alert(tmp.outerHTML)
					 //设置选中的tr
					tmp.className="tdonselect";

				   
				//form1.submit();
			}
			<!--
			var openID = "";  //处于展开状态的菜单ID
			var firstLength = 3;   //一级子菜单的长度
			var subLength = 3;    //两级菜单的长度差
			var off_img = "blue_skin/main_16.gif";//缩进时图片
            var on_img = "blue_skin/main_23.gif";//展开时图片
      
			

			function tree(ctlID)   //点击菜单时菜单的伸缩
			{
			document.all(ctlID).className="tdonselect";
					var isOpen = -1;   //该菜单下的所有菜单是展开还是缩进 0为缩进,1为展开
				var obj;
       
				for(var i=0;i<document.all.length;i++)
				{
				  obj = document.all.item(i);
					if(obj.id.length >= firstLength)
					{
						if(obj.id.substring(0,ctlID.length) == ctlID
									&& obj.id.length > ctlID.length ){
									  						
								if(obj.style.display == "none" && obj.id.length == ctlID.length+3){
								  
									obj.style.display = "";
									changeImage(document.all(ctlID),on_img);
									
								}else{
								  
									obj.style.display = "none";
									changeImage(document.all(ctlID),off_img);
									
								}
							
						}else if(obj.id.substring(0,ctlID.length) != ctlID){//所有同级菜单都收缩
						
						    if (obj.id.length == ctlID.length){
						      						      
						        changeImage(obj,off_img);
						        
						    }else if(obj.id.length > ctlID.length ){
									  
							     // obj.style.display = "none";
							
						    }
						}
					}
				}
				
			}

			function tree1(ctlID)   //二级子菜单
			{
			  
				var isOpen = -1;   //该菜单下的所有菜单是展开还是缩进 0为缩进,1为展开
				var obj;
        
				for(var i=0;i<document.all.length;i++)
				{
				  obj = document.all.item(i);
					if(obj.id.length > firstLength)
					{
						if(obj.id.substring(0,ctlID.length) == ctlID
									&& obj.id.length > ctlID.length ){
									  							
								if(obj.style.display == "none"){
								  
									obj.style.display = "";
									changeImage(document.all(ctlID),on_img);
									
								}else{
								  
									obj.style.display = "none";
									changeImage(document.all(ctlID),off_img);
									
								}
							
						}else if(obj.id.substring(0,ctlID.length) != ctlID){//所有同级菜单都收缩
						    if (obj.id.length == ctlID.length){
						      						      
						        changeImage(obj,off_img);
						        
						    }else if(obj.id.length > ctlID.length ){
									  
							      obj.style.display = "none";
							
						    }
						}
					}
				}
				
			}

			function iniTtree()
			{
				var thisID = "";
				for(var i=0;i<document.all.length;i++)
				{
					if(document.all.item(i).id.length>0)
					{
						if(thisID == "")
							thisID = document.all.item(i).id;
						if(document.all.item(i).id.length > thisID.length)
							document.all.item(i).style.display = "none";
					}
				}
				tree(thisID);
			}
			
			//把oTr里的图片换成sImg
			function changeImage(oTr,sImg){
			  //var oTr = event.srcElement.parentElement;
			  if (oTr.tagName != "TR") return(false);
			  
			  var aObj = oTr.getElementsByTagName("IMG");
			  for(var i = 0; i < aObj.length; i++){
			    if(aObj[i].src != null 
			        && (aObj[i].src.indexOf(on_img.substring(on_img.indexOf("/"),on_img.length - 1)) != -1 
			        || aObj[i].src.indexOf(off_img.substring(off_img.indexOf("/"),off_img.length - 1)) != -1 )){
			      aObj[i].src = sImg; 
			    }
			  }
			}