/*********************************************************************************
 * swap_image.js - Swap images when mouse is over image or when page is active
 *
 * Description:	This script swaps image1 with image2 when mouse
						moves over image1.
 *  
 ********************************************************************************/

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

/*********************************************************************************
 *  Description:	Swap to active image when page is actively loaded
 *  
 ********************************************************************************/
function highlightbutton()
{
	url = window.location.href;
	var slash = "/";
	var filename = url.substring(url.lastIndexOf (slash) + 1, url.length) ;

	switch (filename){
		case "": /* If filename is blank, check for url */
			if ((url == "http://www.dancingwithgrace.com/" ) || (url == "http://www.dancingwithgrace.com") || (url == "http://dancingwithgrace.com/") || (url == "http://dancingwithgrace.com") )
			{
				LoadImage('Home','images/menu_buttons/mb_home_2.jpg');
			}
			break;
		case "index.html":
				LoadImage('Home','images/menu_buttons/mb_home_2.jpg');
			break;
		case "baltimore-salsa-lessons.html":
			LoadImage('Dance_Lessons','images/menu_buttons/mb_dance_lessons_2.jpg');
			break;
		case "salsa-videos.html":
			LoadImage('Salsa_Videos','images/menu_buttons/mb_salsa_videos_2.jpg');
			break;
		case "faq.html":
			LoadImage('FAQs','images/menu_buttons/mb_faqs_2.jpg');
			break;
		case "salsa-music-selections.html":
			LoadImage('Music_CDs','images/menu_buttons/mb_music_cds_2.jpg');
			break;
		case "baltimore-club-reviews.html":
			LoadImage('Baltimore_Club_Reviews','images/menu_buttons/mb_balt_club_revs_2.jpg');
			break;
		case "newsletters.html":
			LoadImage('Newsletters','images/menu_buttons/mb_newsletters_2.jpg');
			break;
		case "articles.html":
			LoadImage('Articles','images/menu_buttons/mb_articles_more_2.jpg');
			break;
		case "dance-programs.html":
			LoadImage('Dance_Programs','images/menu_buttons/mb_school_programs_2.jpg');
			break;
		case "locallinks.html":
			LoadImage('Local_Links','images/menu_buttons/mb_local_links_2.jpg');
			break;
		case "resources.html":
			LoadImage('Resources','images/menu_buttons/mb_resources_2.jpg');
			break;
		case "instructors.html":
			LoadImage('Instructors','images/menu_buttons/mb_instructors_2.jpg');
			break;
		case "about-us.html":
			LoadImage('About_Us','images/menu_buttons/mb_about_us_2.jpg');
			break;
		case "contact-us.html":
			LoadImage('Contact_Us','images/menu_buttons/mb_contact_us_2.jpg');
			break;
		default :
				/* Do nothing */
	}
}

function LoadImage(imageName,imageFile)
{
	  var loadingImage = false;
	  if ((!document.images) || loadingImage) return;

	  loadingImage = true;

	  if (document.images[imageName].src.indexOf(imageFile)<0)
	  {
		document.images[imageName].src = imageFile;
	  }
	  loadingImage = false;
}