function showMainPic(newnum){				
		$('viewed_pic').setAttribute('src', srcs[newnum].src);
		$('viewed_title').update(srcs[newnum].title);
		num = newnum;
	}
	
	function prevHendler(){
		if(num != 0)		
				showMainPic(num-1);				
		return false;
	}

	function nextHendler(){
		var inknum = num+1;
		if(inknum < srcs.length)		
				showMainPic(inknum);				
		return false;
	}