safari=(navigator.userAgent.indexOf('Safari')!=-1);

function doPrevious() {
	
	if (document.images) {

		if (current > 0) {
			
			if (safari) {
				document.portfolioimg.src = "images/trans.gif" ;
			}
			
			document.portfolioimg.src = imgarr[current-1] ;
			document.getElementById("bodycopy").innerHTML=details[current-1];
			

			if (document.getElementById("spotlink"))
			{
				if (current == 4) {
					document.getElementById("spotlink").innerHTML = "<a href='#' class='txt-link-exper' onClick=MM_openBrWindow('interactivePopUps/lewis-spot.html','','width=320,height=240')>click to view spot </a>";
				}
				else
				{
					document.getElementById("spotlink").innerHTML="";
				}
			}
			current-- ;
		}
		
	}

	nav();
}


function doNext() {

	var imgw;
	var imgh;
	var imgn = new Image();

	if (document.images) {

		if (current < numimages) {

			if (safari) {
				document.portfolioimg.src = "images/trans.gif" ;
			}

			document.portfolioimg.src = imgarr[current+1] ;
			document.getElementById("bodycopy").innerHTML=details[current+1];


			if (document.getElementById("spotlink"))
			{
				if (current == 2) {
					document.getElementById("spotlink").innerHTML = "<a href='#' class='txt-link-exper' onClick=MM_openBrWindow('interactivePopUps/lewis-spot.html','','width=320,height=240')>click to view spot </a>";
				}
				else
				{
					document.getElementById("spotlink").innerHTML="";
				}
			}


			current++ ;			

		}

	}

	nav();

}

function nav() {

	if (current > 0) {
		document.back.src = "brand/back_left.gif";
	} else {
		document.back.src = "brand/back_leftstart.gif";
	}

	if (current >= numimages) {
		document.next.src = "brand/back_rightlast.gif";
	} else {
		document.next.src = "brand/back_right.gif";
	}

}