function change(val)
{
	var td_luxian = document.getElementById("td_luxian");
	var td_jipiao = document.getElementById("td_jipiao");
	var td_jiudian = document.getElementById("td_jiudian");
	var luxian = document.getElementById("luxian");
	var jipiao = document.getElementById("jipiao");
	var jiudian = document.getElementById("jiudian");
	if(val == "luxian")
	{
		td_luxian.className= "check";
		td_jipiao.className= "";
		td_jiudian.className= "";	
		
		luxian.style.display = "block";
		jipiao.style.display = "none";
		jiudian.style.display = "none";
	}
	if(val == "jipiao")
	{
		td_luxian.className= "";
		td_jipiao.className= "check";
		td_jiudian.className= "";	
		luxian.style.display = "none";
		jipiao.style.display = "block";
		jiudian.style.display = "none";
	}
	if(val == "jiudian")
	{
		td_luxian.className= "";
		td_jipiao.className= "";
		td_jiudian.className= "check";	
		luxian.style.display = "none";
		jipiao.style.display = "none";
		jiudian.style.display = "block";

	}
}