// JavaScript Document
var i=1;
function aa_left(num){
	if(i<num){
		var left_text="left_text"+i;
		document.getElementById(left_text).style.display="none";
		var center_img="center_img"+i;
		document.getElementById(center_img).style.display="none";
		i++;
		var left_text1="left_text"+i;
		document.getElementById(left_text1).style.display="";
		var center_img1="center_img"+i;
		document.getElementById(center_img1).style.display="";
	}
}
function aa_right(num){
	if(i>1){
		var left_text="left_text"+i;
		document.getElementById(left_text).style.display="none";
		var center_img="center_img"+i;
		document.getElementById(center_img).style.display="none";
		i--;
		var left_text1="left_text"+i;
		document.getElementById(left_text1).style.display="";
		var center_img1="center_img"+i;
		document.getElementById(center_img1).style.display="";
	}
}