var preloadFlag = false;
var imgName;              // button rolled over now
var thisPage;             // page loaded now
var mainNav;              // main nav btn now

function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function preloadImages(thisPage) { // main nav preloader
	if (document.images) {
		btn1_0 = newImage("images/btn1_0.jpg");
		btn1_1 = newImage("images/btn1_1.jpg");
		btn2_0 = newImage("images/btn2_0.jpg");
		btn2_1 = newImage("images/btn2_1.jpg");
		btn3_0 = newImage("images/btn3_0.jpg");
		btn3_1 = newImage("images/btn3_1.jpg");
		btn4_0 = newImage("images/btn4_0.jpg");
		btn4_1 = newImage("images/btn4_1.jpg");
		btn5_0 = newImage("images/btn5_0.jpg");
		btn5_1 = newImage("images/btn5_1.jpg");
		btn6_0 = newImage("images/btn6_0.jpg");
		btn6_1 = newImage("images/btn6_1.jpg");
		btn7_0 = newImage("images/btn7_0.jpg");
		btn7_1 = newImage("images/btn7_1.jpg");
	  preloadFlag = true;
    mainNav = thisPage;
    imgName = "btn"+mainNav;
    btn_over(imgName);	  
	}
	window.status = "Chelan Rentals - Mountain Cabin Rentals at Lake Chelan - call 509.687.8467";
}

function btn_over(imgName) {
	if (document.images && (preloadFlag == true)) {
		document[imgName].src = eval(imgName + "_1.src");
	} 
}

function btn_off(imgName) {
  if (document.images) {
		if ("btn"+mainNav != imgName) {
			document[imgName].src = eval(imgName + "_0.src");
		}
		else {
			document[imgName].src = eval(imgName + "_1.src");
		}
	}
}

// end