function gallery(id)
	{
		
		if(id==1){
					document.getElementById("bigimage").style.background = "url(images/niihau/niihau_beach.jpg)";
					document.getElementById("caption").innerHTML='Niihau beach';
										}
		if(id==2){
					document.getElementById("bigimage").style.background = "url(images/niihau/sunset_over_niihau.jpg)";
					document.getElementById("caption").innerHTML='Sunset over Niihau';
										}
		if(id==3){
					document.getElementById("bigimage").style.background = "url(images/niihau/niihau_from_polihale_beach.jpg)";
					document.getElementById("caption").innerHTML='Niihau seen from Polihale Beach, Kauai';
					}
		if(id==4){
					document.getElementById("bigimage").style.background = "url(images/niihau/aerial_view_of_puuwai_village.jpg)";
					document.getElementById("caption").innerHTML='Aerial view of Puuwai village';
					}
					
	}