// FORM VALIDATION FUNCTIONS //

function validateForm(){
	if (document.contactForm.contactName.value==""){
		alert("Please enter your Name.");
		document.contactForm.contactName.focus();return false
	}
	if (document.contactForm.contactEmail.value==""|document.contactForm.contactEmail.value.indexOf("@")==-1|document.contactForm.contactEmail.value.indexOf(".")==-1){
		alert("Please enter a valid Email Address.");
		document.contactForm.contactEmail.focus();return false
	}
	if (document.contactForm.contactTelephone.value==""){
		alert("Please enter your Telephone Number.");
		document.contactForm.contactTelephone.focus();return false
	}
	if (document.contactForm.contactMessage.value==""){
		alert("Please enter your Message.");
		document.contactForm.contactMessage.focus();return false
	}
	else{document.contactForm.submit();}	
}

// GALLERY FUNCTIONS //

function fadeSwich(obj){
	if (obj.filters.alpha.opacity==100){
		obj.filters.alpha.opacity=40;}
	else{
		obj.filters.alpha.opacity=100;}
}

function changeImage(imageSrc){
	document.images['largePic'].src=imageSrc}

// NAVIGATION FUNCTIONS //

var lastMenu="null"; 

function langMenuOn(imgName){
	if (imgName.indexOf("prev")!=-1){
		document.images[imgName].src='images/previous.gif';}
	else if (imgName.indexOf("next")!=-1){
		document.images[imgName].src='images/next.gif';}
	else{
		document.images[imgName].src='images/dot_red.gif';}
}

function langMenuOff(imgName){
	if (imgName.indexOf("prev")!=-1){
		document.images[imgName].src='images/previous_grey.gif';}
	else if (imgName.indexOf("next")!=-1){
		document.images[imgName].src='images/next_grey.gif';}
	else{
		document.images[imgName].src='images/spacer.gif';}
}

function navItemOn(cellName, imgName){
if (document.getElementById){
		document.images[imgName].src='images/do.gif';
		document.getElementById(cellName).style.backgroundColor='#CC3300';
	}
}

function navItemOff(cellName, imgName){
	if (document.getElementById){
		document.images[imgName].src='images/spacer.gif';
		if (imgName.indexOf("0")!=-1){
			document.getElementById(cellName).style.backgroundColor='#E4E4E4';}
		else{
			document.getElementById(cellName).style.backgroundColor='#CCCCCC';}
	}
}
 
function showMenu(menuName){
	if (document.getElementById){
		if (lastMenu=='null'){
			document.getElementById(menuName).style.visibility='visible'
		}
		else if (menuName==lastMenu){
			if (document.getElementById(menuName).style.visibility=='visible')
			{document.getElementById(menuName).style.visibility='hidden'}
			else
			{document.getElementById(menuName).style.visibility='visible'}
		}
		else {
		document.getElementById(menuName).style.visibility='visible'
		document.getElementById(lastMenu).style.visibility='hidden'
		}
	}
	
	if (document.layers){
		if (lastMenu=='null'){
			document.layers[menuName].visibility='visible'
		}
		else if (menuName==lastMenu){
			if (document.layers[menuName].visibility=='visible')
			{document.layers[menuName].visibility='hidden'}
			else
			{document.layers[menuName].visibility='visible'}
		}
		else {
		document.layers[menuName].visibility='visible'
		document.layers[lastMenu].visibility='hidden'
		}
	}	
	
	lastMenu=menuName
}