function Helpor_net(seed)
{ var m1 = "欢迎光临浙江克瑞丰球泵业网站,请多提意见。谢谢! !" ;
var m2 = "" ;
var msg=m1+m2;
var out = " ";
var c = 1;
var speed = 120;
if (seed > 100)
{ seed-=2;
var cmd="Helpor_net(" + seed + ")";
timerTwo=window.setTimeout(cmd,speed);}
else if (seed <= 100 && seed > 0)
{ for (c=0 ; c < seed ; c++)
{ out+=" ";}
out+=msg; seed-=2;
var cmd="Helpor_net(" + seed + ")";
window.status=out;
timerTwo=window.setTimeout(cmd,speed); }
else if (seed <= 0)
{ if (-seed < msg.length)
{
out+=msg.substring(-seed,msg.length);
seed-=2;
var cmd="Helpor_net(" + seed + ")";
window.status=out;
timerTwo=window.setTimeout(cmd,speed);}
else { window.status=" ";
timerTwo=window.setTimeout("Helpor_net(100)",speed);
}
}
}
Helpor_net(100);

var speed = 50;       
var max_opacity = 100; 
var min_opacity = 30;	
var do_step  =  5;      

	function change_opacity(obj,do_option)
	{
		if(obj.doing)
			clearInterval(obj.doing);
		obj.doing = setInterval(do_option+"_alpha("+obj.sourceIndex+")",speed);	
	}
	

	function down_alpha(obj_index)
	{
		var obj = document.all[obj_index];
		
		if(obj.filters.Alpha.Opacity > min_opacity )
		{
			obj.filters.Alpha.Opacity += -do_step;
		}	
		else
		{	
			clearInterval(obj.doing);
			obj.filters.Alpha.Opacity = min_opacity;
			obj.doing = false;
		}	
	}	
	function up_alpha(obj_index)
	{
		var obj = document.all[obj_index];
		
		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;
		}	
	}