var homebutton = "nav_welcome_button";
var homebuttonclicked = false;

var weddingbutton = "nav_wedding_button";
var weddingbuttonclicked = false;

var traveltipsbutton = "nav_travel_button";
var traveltipsbuttonclicked = false;

var contactbutton = "nav_contact_button";
var contactbuttonclicked = false;

function setCurrentButton()
{
  var activebutton = parent.document.getElementById("riseThis").value;
	
	buttonStayUp(activebutton);
}

function buttonRise(buttonname)
{
  document.getElementById(buttonname).style.cursor = 'hand';

  document.getElementById(buttonname).src = "images/" + buttonname + "_rise.gif";
}

function buttonLower(buttonname)
{
  if(buttonname == homebutton)
	{
	  if(!homebuttonclicked)
		{
  	  document.getElementById(buttonname).src = "images/" + buttonname + ".gif";
		}
	}
	else if(buttonname == weddingbutton)
	{
	  if(!weddingbuttonclicked)
		{
		  document.getElementById(buttonname).src = "images/" + buttonname + ".gif";
	  }
	}
	else if(buttonname == traveltipsbutton)
	{
	  if(!traveltipsbuttonclicked)
		{
		  document.getElementById(buttonname).src = "images/" + buttonname + ".gif";
	  }
	}
	else if(buttonname == contactbutton)
	{
	  if(!contactbuttonclicked)
		{
		  document.getElementById(buttonname).src = "images/" + buttonname + ".gif";
	  }
	}	
}

function buttonStayUp(buttonname)
{
  document.getElementById(buttonname).src = "images/" + buttonname + "_rise.gif";
		
	// Lower other buttons
	if(buttonname == homebutton)
	{
	  homebuttonclicked = true;
		weddingbuttonclicked = false;
		traveltipsbuttonclicked = false;
		contactbuttonclicked = false;
	
	  buttonLower(weddingbutton);
		buttonLower(traveltipsbutton);		
		buttonLower(contactbutton);
	}
	else if(buttonname == weddingbutton)
	{
	  homebuttonclicked = false;
		weddingbuttonclicked = true;
		traveltipsbuttonclicked = false;
		contactbuttonclicked = false;
	
	  buttonLower(homebutton);
		buttonLower(traveltipsbutton);
		buttonLower(contactbutton);
	}
	else if(buttonname == traveltipsbutton)
	{
	  homebuttonclicked = false;
		weddingbuttonclicked = false;
		traveltipsbuttonclicked = true;
		contactbuttonclicked = false;
	
		buttonLower(homebutton);
		buttonLower(weddingbutton);
		buttonLower(contactbutton);
	}
	else if(buttonname == contactbutton)
	{
	  homebuttonclicked = false;
		weddingbuttonclicked = false;
		traveltipsbuttonclicked = false;
		contactbuttonclicked = true;
	
	  buttonLower(homebutton);
		buttonLower(weddingbutton);
		buttonLower(traveltipsbutton);
	}
	else
	{
	  alert("Navigation Error!");
	}
}

function navigateToPage(buttonname)
{
  if(buttonname == homebutton)
	{
	  parent.location = "../index.html";
	}
	else if(buttonname == weddingbutton)
	{
	  parent.location = "../wedding.html";
	}
	else if(buttonname == traveltipsbutton)
	{
	  parent.location = "../travel.html";
	}
	else if(buttonname == contactbutton)
	{
	  parent.location = "../contact_us.html";
	}
	else
	{
	  alert("Navigation Error!");
	} 
}