window.onload = rolloverInit;

function rolloverInit() {
	for (var i=0; i < document.images.length; i++) {	
		if (document.images[i].parentNode.tagName == "A") {		
			// note to keep image map working, don't put rollover up for navigation map 
			if (document.images[i].src!="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"){
	
				setupRollover(document.images[i]);
			}
		}
	}
}

function setupRollover(thisImage) {  
	thisImage.outImage = new Image();	
	thisImage.outImage.src = thisImage.src;	
	thisImage.onmouseout = rollOut;
		
	thisImage.overImage = new Image();	
	thisImage.overImage.src = "http://www.graylinecancun.com/images-nav/"+thisImage.id+"-over.jpg";	
	thisImage.onmouseover = rollOver;
}

function rollOver() {
	this.src = this.overImage.src;
}

function rollOut() {
	this.src = this.outImage.src;
}
function ProgresoRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_PROGRESO.jpg"; }
function ProgresoRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }

function MayanRivRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_MAYAN_RIV.jpg";}
function MayanRivRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }

function UxmalRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_UXMAL.jpg"; }
function UxmalRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }

function CancunRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_CANCUN.jpg"; }
function CancunRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }

function CozumelRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_COZUMEL.jpg"; }
function CozumelRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }

function YucatanRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_YUCATAN.jpg"; }
function YucatanRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }

function ChichenRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_CHICHEN_ITZA.jpg"; }
function ChichenRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }


function Detail_MapRollover() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_DETAIL_MAP.jpg"; }
function Detail_MapRollout() {document.getElementById("base").src ="http://www.graylinecancun.com/images-nav/nm_BASE.jpg"; }