if (page=="home")
{
	//Preload Nav Images for Home page
	var home_nav_ext_off = new Image(); home_nav_ext_off.src = "images/home_nav_ext_off.gif";
	var home_nav_int_off = new Image(); home_nav_int_off.src = "images/home_nav_int_off.gif";
	var home_nav_cu_off = new Image(); home_nav_cu_off.src = "images/home_nav_cu_off.gif";
	
	var home_nav_ext_on = new Image(); home_nav_ext_on.src = "images/home_nav_ext_on.gif";
	var home_nav_int_on = new Image(); home_nav_int_on.src = "images/home_nav_int_on.gif";
	var home_nav_cu_on = new Image(); home_nav_cu_on.src = "images/home_nav_cu_on.gif";
}
else
{
	//Preload Nav Images for other pages
	var nav_home_off = new Image(); nav_home_off.src = "images/nav_home_off.gif";
	var nav_ext_off = new Image(); nav_ext_off.src = "images/nav_ext_off.gif";
	var nav_int_off = new Image(); nav_int_off.src = "images/nav_int_off.gif";
	var nav_cu_off = new Image(); nav_cu_off.src = "images/nav_cu_off.gif";
	
	var nav_home_on = new Image(); nav_home_on.src = "images/nav_home_on.gif";
	var nav_ext_on = new Image(); nav_ext_on.src = "images/nav_ext_on.gif";
	var nav_int_on = new Image(); nav_int_on.src = "images/nav_int_on.gif";
	var nav_cu_on = new Image(); nav_cu_on.src = "images/nav_cu_on.gif";
	
	switch (page)
	{
		case "ext" : 
			//Preload Exterior Thumbnails
			for (i=1;i<=numpics;i++)
			{
				eval("var ext_th" + i + "_off = new Image(); ext_th" + i + "_off.src = 'images/ext_th" + i + "_off.jpg'")
				eval("var ext_th" + i + "_on = new Image(); ext_th" + i + "_on.src = 'images/ext_th" + i + "_on.jpg'")
			}
			
			break;
		case "int" : 
			//Preload Interior Thumbnails
			for (i=1;i<=numpics;i++)
			{
				eval("var int_th" + i + "_off = new Image(); int_th" + i + "_off.src = 'images/int_th" + i + "_off.jpg'")
				eval("var int_th" + i + "_on = new Image(); int_th" + i + "_on.src = 'images/int_th" + i + "_on.jpg'")
			}
			break;
	}
}

function MOver(img)
{
	eval("document.getElementById(img).src = " + img + "_on.src")
}
function MOut(img)
{
	eval("document.getElementById(img).src = " + img + "_off.src")
}

function ChangeMain(num)
{
	if (parseInt(num)<=numpics)
	{
		var imgname = page + "_" + num
		var thname = page + "_th" + num
		document.getElementById("main").src = "images/" + imgname + ".jpg"
		AllThOff()
		eval("document.getElementById(thname).src = " + thname + "_on.src")
		currimg = parseInt(num)
	}
}
function MainOver(num)
{
	var newnum = parseInt(num)
	var thname = page + "_th" + newnum
	if (!(currimg==newnum)&&newnum<=numpics)
	{
		eval("document.getElementById(thname).src = " + thname + "_on.src")
	}
}
function MainOut(num)
{
	var newnum = parseInt(num)
	var thname = page + '_th' + num
	if (!(currimg==newnum)&&newnum<=numpics)
	{
		eval("document.getElementById(thname).src = " + thname + "_off.src")
	}
}
function AllThOff()
{
	for (i=1;i<=numpics;i++)
	{
		var thname = page + '_th' + i
		eval("document.getElementById(thname).src = " + thname + "_off.src")
	}
}

function CheckInput()
{
	var frm = document.form_contactus
	var errmsg = ""
	var rtn = true
	var yourname = frm.YourName.value
	var youremail = frm.YourEmail.value
	var phone = frm.Phone.value
	var msg = frm.Message.value
	
	if (yourname =="")
	{
		errmsg += "Please enter your name.\n"
		rtn=false
	}
	
	if (youremail =="")
	{
		errmsg += "Please enter your email address.\n"
		rtn=false
	}
	else if (validateemail(youremail) ==false)
	{
		errmsg += "Please enter a valid email address.\n"
		rtn=false
	}
	
	/*
	if (phone=="")
	{
		errmsg += "Please enter your phone number.\n"
		rtn=false
	}
	*/
	if (msg=="")
	{
		errmsg += "Please enter your message.\n"
		rtn=false
	}
	if (rtn==false)
	{
		alert(errmsg)
	}
	return rtn
}

function validateemail(src) {
     var emailReg = "^[\\w-_\.]*[\\w-_\.]\@[\\w]\.+[\\w]+[\\w]$";
     var regex = new RegExp(emailReg);
     return regex.test(src);
  }