// Set up the tabs
var Gtab_ids = new Array("tab_this", "tab_that", "tab_theother" );
var Gdefault_image = "/images/ripples.jpg";

function switchTab(tab_in) {

	// Where are we going? 
	var dest_html = tab_in + ".htm";
	var cell_tab = "";
	var a_tab = "";
	
	document.getElementById("content_iframe").src = dest_html;

   // Turn off all the current tabs
   for (var i=0; i<Gtab_ids.length; i++)
   {
		cell_tab = "cell_" + Gtab_ids[i];
		a_tab    = "a_" + Gtab_ids[i];
      document.getElementById(cell_tab).className = "tabunselected";
      document.getElementById(a_tab).className    = "tabunselectedfont";
   }
	
	// ... and turn on the selected tab
	cell_tab = "cell_" + tab_in;
	a_tab    = "a_" + tab_in;
	document.getElementById(cell_tab).className = "tabselected";
   document.getElementById(a_tab).className    = "tabselectedfont";

	// Reset the default image
	selectImage('default');
}

function selectImage(image_in) {

	if ( image_in == 'default' ) {
		image_in = Gdefault_image;
	}

	document.getElementById("main_image").src = image_in;	
}

function setDefaultImage(img) {
	Gdefault_image = img;
	selectImage(img);
}