picnavarray =['veh1.jpg','veh2.jpg','veh5.jpg','veh6.jpg','veh3.jpg','veh4.jpg']
picindex = 0;

function picnavrt(){
	picindex = picindex + 1;
		checkpicnav();

	document.getElementById('picnavimg').src="veh/"+picnavarray[picindex];

}

function picnavlt(){
	picindex = picindex - 1;
		checkpicnav();

	document.getElementById('picnavimg').src="veh/"+picnavarray[picindex];

}

function checkpicnav(){
	if (picindex > 5){picindex=0;}
	if (picindex < 0){picindex=5;}
}

function showpicnav(){
	document.getElementById('picnavbar').style.visibility="visible";
	document.getElementById('picnavbuttons').style.visibility="visible";
}

function hidepicnav(){
	document.getElementById('picnavbar').style.visibility="hidden";
	document.getElementById('picnavbuttons').style.visibility="hidden";
}