function CLASS_LIANDONG_YAO(array)
  { 
   //数组，联动的数据源
      this.array=array;  
      this.indexName='';
      this.obj=''; 
      //设置子SELECT 
    // 参数：当前onchange的SELECT ID，要设置的SELECT ID 
      this.subSelectChange=function(selectName1,selectName2) 
      { 
      //try 
      //{ 
    var obj1=document.all[selectName1]; 
    var obj2=document.all[selectName2]; 
    var objName=this.toString(); 
    var me = this;
   
    obj1.onchange=function() 
    {         
        me.optionChange(this.options[this.selectedIndex].value,obj2.id)
    }
   }
    //设置第一个SELECT
    // 参数：indexName指选中项,selectName指select的ID 
      this.firstSelectChange=function(indexName,selectName)   
      { 
		  this.obj=document.all[selectName]; 
		  this.indexName=indexName; 
		  this.optionChange(this.indexName,this.obj.id)
	  } 
   
  // indexName指选中项,selectName指select的ID 
      this.optionChange = function (indexName,selectName)
      { 
			var obj1=document.all[selectName];
			var me=this;
			obj1.length=0;
			obj1.options[0]=new Option("请选择",''); 
			for(var i=0;i<this.array.length;i++) 
			{     
				if(this.array[i][1]==indexName)
				{ 
					  //alert(this.array[i][1]+" "+indexName); 
					  obj1.options[obj1.length]=new Option(this.array[i][2],this.array[i][0]);
				}
			}
			obj1.fireEvent("onChange");
	  }

	  this.lastChange = function (urlAddress,selectName)
	  {
		  var objSel = document.all[selectName];
		  if (!objSel.onchange)
		  {
			objSel.onchange = function () {
					if (objSel.selectedIndex != 0)
					{
							window.location.href = "/ehibition/ehibition_sort.asp?sort_id=" + objSel.options[objSel.selectedIndex].value;
					}	
			
			}			

		
		  }
	  }
  }