var loadImg = new Array(
	'images/btn_01_ov.gif',
	'images/btn_02_ov.gif',
	'images/btn_03_ov.gif',
	'images/btn_04_ov.gif',
	'images/btn_05_ov.gif',
	'images/btn_06_ov.gif'
);
var PrImg = new Array();
for(i=0; i<loadImg.length; i++){
	PrImg[i] = new Image();
	PrImg[i].src = loadImg[i];
}
var mainNum = 1;
var num;
function chagePictF(num) {

for(i=0; i<6 ; i++){
hideDiv = 'no0'+ (i+1);
document.getElementById(hideDiv).style.display = 'none';
}
document.getElementById('no0' + num).style.display = 'block';

	var i;
	for( i = 1; i <= 6; i++ ){
	var chagePict1 = "chagePict" + i;
		chagePict1 = document.getElementById(chagePict1);
		chagePict1.src = "images/btn_0"+i+"_off.gif";
	}
	var chagePict2 = "chagePict" + num;
		chagePict2 = document.getElementById(chagePict2);
		chagePict2.src = "images/btn_0"+num+"_ov.gif";
		
	mainNum = num;

}

function ovImg(num) {
	var chagePict = "chagePict" + num;
		chagePict = document.getElementById(chagePict);
		chagePict.src = "images/btn_0"+num+"_ov.gif";
	}
function offImg(num) {
	if( num !== mainNum ){
		var chagePict = "chagePict" + num;
			chagePict = document.getElementById(chagePict);
			chagePict.src = "images/btn_0"+num+"_off.gif";
		}
	}