function SwapLeftBar(){
	var panel = document.getElementById('leftbar');
	var swapper = document.getElementById('left_swapper');
	if (panel .width != 30){
		panel .width = 30;
		swapper.src = img_src_arr_right;
	}
	else{
		panel .width = 60;
		swapper.src = img_src_arr_left;
	}
}

function SwapRightBar(){
	var panel = document.getElementById('rightbar');
	var swapper = document.getElementById('right_swapper');
	if (panel .width != 30){
		panel .width = 30;
		swapper.src = img_src_arr_left;
	}
	else{
		panel .width = 70;
		swapper.src = img_src_arr_right;
	}
}