/**	setTabSelected 
	@param: String category 
	@desc: used to highlight the appropriate tab in the main navigation
	*/
function setTabSelected(category) {
	var c = category.toUpperCase();
	
	// set all the tab classes back to defaults
	// this prevents multiple tabs from being selected
	if(document.getElementById("nav_art")) 	 { document.getElementById("nav_art").className = "navUnselected"; }
	if(document.getElementById("nav_design")) 	 { document.getElementById("nav_design").className = "navUnselected"; }
	if(document.getElementById("nav_maps")) 	 { document.getElementById("nav_maps").className = "navUnselected"; }
	if(document.getElementById("nav_contact"))  { document.getElementById("nav_contact").className = "navUnselected";}
	if(document.getElementById("nav_quickview")){ document.getElementById("nav_quickview").className = "navUnselected"; }
	
	// set selected tab by matching against the category provided
	switch (c)
	{
		case "ART":
		document.getElementById("nav_art").className = "navSelected";
		break;
		
		case "DESIGN":
		document.getElementById("nav_design").className = "navSelected";
		break;
		
		case "MAPS":
		document.getElementById("nav_maps").className = "navSelected";
		break;
		
		case "QUICKVIEW":
		document.getElementById("nav_quickview").className = "navSelected";
		break;
		
		case "CONTACT":
		document.getElementById("nav_contact").className = "navSelected";
		break;
		
		default: // if none found, no tabs will be selected
		break;
	}

}

/**	swapText 
	@param: String targetElement
	@param: String text to swap
	@desc: used to highlight the appropriate tab in the main navigation
	*/
function swapText(targetElement, txt) {
		if (document.getElementById(targetElement)) {
			document.getElementById(targetElement).innerHTML = txt;
		}
}

function swapImage(targetElement, url) {
	if (document.getElementById(targetElement)) {
		document.getElementById(targetElement).src = url;
	}
}

// Example:
// simplePreload( '01.gif', '02.gif' ); 
function simplePreload()
{ 
  var args = simplePreload.arguments;
  document.imageArray = new Array(args.length);
  for(var i=0; i<args.length; i++)
  {
    document.imageArray[i] = new Image;
    document.imageArray[i].src = args[i];
  }
}