<!--
var slidespeed=3000
var slideimages=new Array("../images/slide_1.jpg","../images/switch_1.jpg","../images/switch_2.jpg","../images/switch_3.jpg","../images/switch_4.jpg","../images/switch_5.jpg","../images/switch_6.jpg","../images/switch_7.jpg","../images/switch_8.jpg","../images/switch_9.jpg")
var imageholder=new Array()
var ie=document.all
for (i=0;i<slideimages.length;i++){
imageholder[i]=new Image()
imageholder[i].src=slideimages[i]
}

//***************导航条透明变换*******************
var speed = 50;        //变换速度
var max_opacity = 100;  //透明度最大值
//var min_opacity = 10;	//透明度最小值
var do_step  =  10;      //变换程度

function opacity_change(obj,do_option)
{
	if(obj.doing) clearInterval(obj.doing);
	obj.doing = setInterval("alpha_" + do_option +"("+obj.sourceIndex+")",speed);	
}
function alpha_down(obj_index)
{
		
	var obj = document.all[obj_index];	
	obj.className = "alpha100";				
}	
function alpha_up(obj_index)
{
	var obj = document.all[obj_index];		
	obj.className = "alpha10";
	if(obj.filters.Alpha.Opacity < max_opacity)
		obj.filters.Alpha.Opacity += do_step;
	else
	{	
		clearInterval(obj.doing);
		obj.filters.Alpha.Opacity = max_opacity;			
		obj.doing = false;
	}	
}
//-->