function Linkage(list)
{	
	if(list == null) return;
	
	var linkageList = document.all[list.LinkageList];	
	if(linkageList == null) return;
	
	linkageList.Clear = ClearItems;
	linkageList.DataBind = DataBind;
	
	linkageList.DataSource =  ZSoft.Web.Controls.LinkageDataAdapter.GetDataSource(list.LinkageDataProvider,list.value).value;
	linkageList.DataBind();
	Linkage(linkageList);
	
	/*
	if(list.style.display != "none")
	{
		if(linkageList.style.display == "none")
		{
			list.selectedValue = list.value;
		}
		else
		{
			var l = document.all[linkageList.LinkageList];	
			if(l == null)
			{
				list.selectedValue = linkageList.value;
			}
			else
			{
				list.selectedValue = linkageList.selectedValue;
			}
		}
		
	}
	*/
}

function ClearItems()
{	
	for(var i = this.options.length - 1;i >= 0; i --)
	{
		this.remove(i);
	}
}

function DataBind()
{
	this.Clear();
	var ds = this.DataSource;
	if(ds == null) return;
	if(ds.Tables == null) return;
	if(ds.Tables.length == 0) return;
	var rows = ds.Tables[0].Rows;	
	for(var i = 0;i < rows.length;i ++)
	{
		var text = rows[i][this.DataTextField];		
		var value = rows[i][this.DataValueField];
		var newOption = document.createElement("OPTION");
		newOption.text = unescape(text);
		newOption.value = value;
		this.options.add(newOption);		
	}
//	if(this.options.length == 0) this.style.display = "none";
//	else this.style.display = "";
	
	if(this.options.length == 0)
	{
	//	this.style.display = "none";
	}
	else 
	{
	//	list.style.display = "";
	
		//??????????????
		if(this.CustomWidth != "true")
		{
			this.style.width = "";					
		}
	}
}