function gallery(id)
	{
		if(id==1){
					document.getElementById("bigimage").style.background = "url(../images/dolphins/photo_with_the_dolphin.jpg)";
				
										}
		if(id==2){
					document.getElementById("bigimage").style.background = "url(../images/dolphins/happy_dolphin.jpg)";
					
										}
	
		if(id==3){
					document.getElementById("bigimage").style.background = "url(../images/dolphins/jump.jpg)";
					
										}
					
		if(id==4){
					document.getElementById("bigimage").style.background = "url(../images/dolphins/swimming_with_dolphins.jpg)";
				
										}

	}