var dutyIdx = 1;
var timer;
function ChgPic(idx,flag){
	if(flag==1){
		clearInterval(timer);
	}
	idx = idx % 4;
	if(idx==0)
		idx = 1;
	showBlock('hotPro',idx,3,'on7','off7');
	dutyIdx = idx+1;
};

function setItv(){
	timer = setInterval("ChgPic(dutyIdx,0)",2000);
};

function showBlock(flag,idx,ttl,onClass,offClass){
	for(var i=1;i<=ttl;i++){
		id('tab_'+flag+'_'+i).className = offClass;
	}
	id('tab_'+flag+'_'+idx).className = onClass;
	for(var i=1;i<=ttl;i++){
		id('cnt_'+flag+'_'+i).className = "off";
	}
	id('cnt_'+flag+'_'+idx).className = "on";
}

function showBlock2(flag,idx,ttl,onClass,offClass){
	for(var i=1;i<=ttl;i++){
		id('tab_'+flag+'_'+i).className = offClass;
	}
	id('tab_'+flag+'_'+idx).className = onClass;
	for(var i=1;i<=ttl;i++){
		id('cnt_'+flag+'_'+i).style.display = "none";
	}
	id('cnt_'+flag+'_'+idx).style.display = "block";
}