/* NAVIGATION BUTTONS */


	////////// IMAGE SWAPPING SCRIPT //////////
		
	if (document.images) {
		relPath = "resources/gifs/interface/"
		photoPath = "resources/gifs/photos/"
	
		imag = new Array();
		
		imag[0] = relPath + "author.gif";
		imag[1] = relPath + "author-o.gif";
		imag[2] = relPath + "author-d.gif";
		imag[3] = relPath + "excerpts.gif";
		imag[4] = relPath + "excerpts-o.gif";
		imag[5] = relPath + "excerpts-d.gif";
		imag[6] = relPath + "home.gif";
		imag[7] = relPath + "home-o.gif";			
		imag[8] = relPath + "home-d.gif";
		imag[9] = relPath + "order.gif";	
		imag[10] = relPath + "order-o.gif";
		imag[11] = relPath + "order-d.gif";	
		imag[12] = relPath + "photos.gif";
		imag[13] = relPath + "photos-o.gif";
		imag[14] = relPath + "photos-d.gif";		
		imag[15] = relPath + "testimonials.gif";
		imag[16] = relPath + "testimonials-o.gif";
		imag[17] = relPath + "testimonials-d.gif";		
		
		imag[50] = photoPath + "alycia-tb.jpg"
		imag[51] = photoPath + "alycia-tbo.jpg"
		imag[52] = photoPath + "at_ease-tb.jpg"
		imag[53] = photoPath + "at_ease-tbo.jpg"
		imag[54] = photoPath + "eben-tb.jpg"
		imag[55] = photoPath + "eben-tbo.jpg"
		imag[56] = photoPath + "equestrian-tb.jpg"
		imag[57] = photoPath + "equestrian-tbo.jpg"
		imag[58] = photoPath + "jillian-tb.jpg"
		imag[59] = photoPath + "jillian-tbo.jpg"
		imag[60] = photoPath + "little_lauren-tb.jpg"
		imag[61] = photoPath + "little_lauren-tbo.jpg"
		imag[62] = photoPath + "luke-tb.jpg"
		imag[63] = photoPath + "luke-tbo.jpg"
		imag[64] = photoPath + "maiden-tb.jpg"
		imag[65] = photoPath + "maiden-tbo.jpg"
		imag[66] = photoPath + "true_love-tb.jpg"
		imag[67] = photoPath + "true_love-tbo.jpg"	

		im = new Array();
		for (var i = 0; i < imag.length; i++) {
			im[i] = new Image; im[i].src = imag[i]; 
			}
		}
	
	function swapImage(imgName, num) {
		if (document.images && imgName) {
			imgName.src = im[num].src;	
			}
			
		return;	
		}


/* MAIL POPUP */

function mailto() {

	var theMail = "mail.html";
	var theTitle = "Contact Twombly Publishing";
	var mailAttributes = "width=600,height=450";

	window.open(theMail,"", mailAttributes);
	return false;
	}

	
/* CALCULATE THE SHOPPING CART */	

function calculateTax() {
	var myForm = document.getElementsByTagName("input");
	var subTotal = myForm[0].value;
	var taxable = myForm[1].checked;
	var shipping = myForm[3].value;
	
	subTotal = parseFloat(subTotal);	// string to number
	
	if (taxable == true) {
		var theTax = subTotal * .05;
		theTax = parseFloat(theTax);	// string to number
		} else {
		var theTax = 0;
		}	

	shipping = parseFloat(shipping); 	// string to number
	var theTotal = subTotal + theTax + shipping;


	// FIX FORMAT
	subTotal = Math.round(subTotal * 100)/100;	
	shipping = Math.round(shipping * 100)/100;	
	theTax = Math.round(theTax * 100)/100;
	theTotal = Math.round(theTotal * 100)/100;	

	myForm[2].value = theTax;
	myForm[4].value = theTotal;
	myForm[9].value = theTotal;	
		
	
	}

function calculateTotal(cart) {
	var myForm = document.getElementsByTagName("input");			
	var taxable = myForm[1].checked;

	theVal = cart.value;
	subTotal = theVal * 16.99;
	

	if (taxable == true) {
		var theTax = subTotal * .05;
		theTax = parseFloat(theTax);	// string to number		
		} else {
		var theTax = 0;
		}
	
	if (theVal == 1) {
		var shipping = 4.00;
		} else {
		var shipping = (theVal * 2) + 2;
		}

	shipping = parseFloat(shipping); 	// string to number
	var theTotal = subTotal + theTax + shipping;
	
	// FIX FORMAT
	theTotal = Math.round(theTotal * 100)/100;	
	subTotal = Math.round(subTotal * 100)/100;	
	shipping = Math.round(shipping * 100)/100;	
	theTax = Math.round(theTax * 100)/100;	
	

	// APPLY TO THE FORM
	myForm[0].value = subTotal;
	myForm[2].value = theTax;
	myForm[3].value = shipping; 
	myForm[4].value = theTotal;
	myForm[9].value = theTotal;	

//	alert (theTotal)

	return false;
	}
	
// SHOW PICTURE IN NEW WINDOW	


function showPic(name, width, height) {
	var thePic = name;
	var theWidth = width;
	var theHeight = height;
	
	var thePicPath = "resources/gifs/photos/" + thePic + ".jpg";
	var theAttributes = "width=" + theWidth + ",height=" + theHeight + ",scrollbars=auto,status=no,toolbar=no";
	
	picWin = window.open(thePicPath, thePic, theAttributes);
	return false;
	}




/* ASSIGN ADDITIONAL STYLESHEET FOR IE */

		if (navigator.appName.indexOf('Microsoft Internet Explorer') != -1) {
			// IE
			document.write ('<link rel="stylesheet" href="resources/css/winIE.css" type="text/css">') 
			}