var directin = "left";
var left = -40;
var count = 1;

function move_left(){
	var	maxleft = -1600;
	if(left >= maxleft){
		if(count <= 20){
			left = left-05;
			document.getElementById("thumbarea").style.marginLeft = left+"px";
			setTimeout("move_left();",20);
			count++;
		}
		else{
			count = 1;
			directin = "left";
		}
	}
}
function move_right(){
	var	maxleft = -40;
	if(left <= maxleft){
		if(count <= 20){
			left = left+05;
			document.getElementById("thumbarea").style.marginLeft = left+"px";
			setTimeout("move_right();",20);
			count++;
		}
		else{
			count = 1;
			directin = "right";
		}
	}
}
function auto_move(){
	var	maxleft = -40;
	var	maxright = -1600;
	if(directin == "left"){
		if(left >= maxright){
			left = left-01;
			document.getElementById("thumbarea").style.marginLeft = left+"px";
			setTimeout("auto_move();",20);
		}
		else{
			directin = "right";	
			setTimeout("auto_move();",20);
		}
	}
	else{
		if(left <= maxleft){
			left = left+01;
			document.getElementById("thumbarea").style.marginLeft = left+"px";
			setTimeout("auto_move();",20);
		}
		else{
			directin = "left";	
			setTimeout("auto_move();",20);
		}
	}
}
auto_move();