var preloadArray = ["http://www.sfballet.org/image/nav/home_on.gif", "http://www.sfballet.org/image/nav/contactus_on.gif", "http://www.sfballet.org/image/nav/search_on.gif", "http://www.sfballet.org/image/nav/login_on.gif", "http://www.sfballet.org/image/nav/logout_on.gif", "http://www.sfballet.org/image/nav/logout_on.gif", "http://www.sfballet.org/image/nav/shoppingcart_on.gif", "http://www.sfballet.org/image/nav/performancestickets_on.gif", "http://www.sfballet.org/image/nav/about_on.gif", "http://www.sfballet.org/image/nav/support_on.gif", "http://www.sfballet.org/image/nav/school_on.gif", "http://www.sfballet.org/image/nav/danceeducation_on.gif",  "http://www.sfballet.org/image/nav/merchandise_on.gif", "http://www.sfballet.org/image/nav/privacypolicy_on.gif", "http://www.sfballet.org/image/nav/conditionsofuse_on.gif", "http://www.sfballet.org/image/nav/siteguide_on.gif"]
var ns4, dom
if (parseInt(navigator.appVersion) == 4) {
	if (navigator.appName == "Netscape") {
		ns4 = true
	} else {
		dom = true
	}
}
	
var userOS;
userOS = navigator.platform;
userOS = userOS.substr(0,3);
userOS = userOS.toLowerCase();

var contentIndex = "";			
	
	
function go(s) {
	window.location.assign(s);
}

// olde popup, sometimes used in checkout path
function popWindow(theURL,winName,features) {
	window.open(theURL,winName,features);
}

// Newfangled Popup
// 	usage: popuplink(['js-only url',] this[, w[, h[, scroll[, extras]]]])
// 	basic usage: <a href="popup.html" target="_blank" onclick="return(popuplink(this));">new pop</a>
// 	advanced usage: <a href="popup_nojs.html" target="_blank" onclick="return(popuplink('popup_yesjs.html', this, 200, 100, false));">new pop</a>
// 	site-wide defaults:
popup_w = 600;
popup_h = 450;
popup_scroll = true;
popup_extras = 'location=0,status=0,menubar=0,resizable=0';
//	POPUP_FANCY = 'location=yes,toolbar=yes,menubar=yes,directories=yes,status=yes,resizable=yes';
// 	NS4 placement:   	screenX and screenY
//	IE placement:		left and top
function popuplink() {
	var undef, i=0, args=popuplink.arguments;
	var url = (typeof(args[i])=='string') ? args[i++] : args[i].getAttribute('href');
	var target = args[i++].getAttribute('target') || '_blank';
	var w = args[i++];
	var h = args[i++];
	var s = (args[i]===undef) ? popup_scroll : args[i++];
	var features = 'width=' + (w || popup_w)
		 + ',height=' + (h || popup_h)
		 + ',scrollbars=' + (s ? 'yes,' : 'no,')
		 + (args[i] || popup_extras);
	var win = window.open(url, target, features);
	win.focus();
	return false;
}
// END GENERAL-PURPOSE POP UP

function popWindow(theURL,winName,features) {
	window.open(theURL,winName,features);
}



// ROLLOVER SCRIPTAGE FOR MAIN NAV ==========
function imageLoader(a) {
	if (document.images) {
		if (!document.p) document.p=new Array();
		var i, j=document.p.length;	
		for (i=0; i<a.length; i++)
			if (a[i].indexOf("#")!=0) { document.p[j] = new Image; document.p[j++].src = a[i]; }
	}
}
function preloadImages() {
	imageLoader(preloadArray);
}


// start preloading images after page load
if (window.addEventListener) {
	window.addEventListener("load", preloadImages, true);
} else if (window.attachEvent) {
	window.attachEvent("onload", preloadImages);
} else {
	window.onload = preloadImages;
}


HOVER_X = "_on"; // mouse-over extension
// USAGE: swap(this, ['newimage.gif'])
function swap(i) {
	if (document.images && i.childNodes) {
		var a = swap.arguments[1], s = i.childNodes[0];
		if (a) s.src = a;
		else {
			var x = s.src.lastIndexOf('.'), xl = HOVER_X.length;
			if (s.src.substring(x-xl, x) == HOVER_X)
				s.src = s.src.substring(0,x-xl)+s.src.substring(x,s.src.length);
			else s.src = s.src.substring(0,x)+HOVER_X+s.src.substring(x,s.src.length);
		}
	}
}


// ================  DHTML MENU FUNCTIONS ====================

function showMenu(x) {
	var tab = "tab"+x;
	var menu = "menu"+x;

	if(document.all) {
	
		tab1.style.visibility = "hidden";
		tab2.style.visibility = "hidden";
		tab3.style.visibility = "hidden";
		tab4.style.visibility = "hidden";
		tab5.style.visibility = "hidden";
		tab6.style.visibility = "hidden";
	
		menu1.style.visibility = "hidden";
		menu2.style.visibility = "hidden";
		menu3.style.visibility = "hidden";
		menu4.style.visibility = "hidden";
		menu5.style.visibility = "hidden";
		menu6.style.visibility = "hidden";
	
	
		if(document.all[tab]!=null) {
			document.all[tab].style.visibility = "visible";
		}
		
		if(document.all[menu]!=null) {
			document.all[menu].style.visibility = "visible";
		}

		document.all['CloserLayer'].style.visibility = "visible";

	} else if(document.getElementById) {
	
		document.getElementById('tab1').style.visibility = "hidden";
		document.getElementById('tab2').style.visibility = "hidden";
		document.getElementById('tab3').style.visibility = "hidden";
		document.getElementById('tab4').style.visibility = "hidden";
		document.getElementById('tab5').style.visibility = "hidden";
		document.getElementById('tab6').style.visibility = "hidden";
	
		document.getElementById('menu1').style.visibility = "hidden";
		document.getElementById('menu2').style.visibility = "hidden";
		document.getElementById('menu3').style.visibility = "hidden";
		document.getElementById('menu4').style.visibility = "hidden";
		document.getElementById('menu5').style.visibility = "hidden";
		document.getElementById('menu6').style.visibility = "hidden";
	
	
	
		if(document.getElementById(tab)!=null) {
			document.getElementById(tab).style.visibility = "visible";
		}
	
		if(document.getElementById(menu)!=null) {
			document.getElementById(menu).style.visibility = "visible";
		}
	
		document.getElementById('CloserLayer').style.visibility = "visible";
	}
}

function showSubMenu(x) {
	var sub = "sub"+x;
	if(document.all) {
	
//		sub11.style.visibility = "hidden";

		if(document.all[sub]!=null) {
			document.all[sub].style.visibility = "visible";
		}

	} else if(document.getElementById) {
	
//		document.getElementById('sub11').style.visibility = "hidden";
	
	if(document.getElementById(sub)!=null) {
		document.getElementById(sub).style.visibility = "visible";
		}
	}
}

function hideSubMenu(x) {
	var sub = "sub"+x;
	if(document.all) {
	
//		sub11.style.visibility = "visible";

		if(document.all[sub]!=null) {
			document.all[sub].style.visibility = "hidden";
		}

	} else if(document.getElementById) {
	
//		document.getElementById('sub11').style.visibility = "visible";
	
	if(document.getElementById(sub)!=null) {
		document.getElementById(sub).style.visibility = "hidden";
		}
	}
}


function closeAll() {
	if(document.all) {
	
		tab1.style.visibility = "hidden";
		tab2.style.visibility = "hidden";
		tab3.style.visibility = "hidden";
		tab4.style.visibility = "hidden";
		tab5.style.visibility = "hidden";
		tab6.style.visibility = "hidden";
	
		menu1.style.visibility = "hidden";
		menu2.style.visibility = "hidden";
		menu3.style.visibility = "hidden";
		menu4.style.visibility = "hidden";
		menu5.style.visibility = "hidden";
		menu6.style.visibility = "hidden";
	
	
	document.all['CloserLayer'].style.visibility = "hidden";

	} else if(document.getElementById) {
	
		document.getElementById('tab1').style.visibility = "hidden";
		document.getElementById('tab2').style.visibility = "hidden";
		document.getElementById('tab3').style.visibility = "hidden";
		document.getElementById('tab4').style.visibility = "hidden";
		document.getElementById('tab5').style.visibility = "hidden";
		document.getElementById('tab6').style.visibility = "hidden";
	
		document.getElementById('menu1').style.visibility = "hidden";
		document.getElementById('menu2').style.visibility = "hidden";
		document.getElementById('menu3').style.visibility = "hidden";
		document.getElementById('menu4').style.visibility = "hidden";
		document.getElementById('menu5').style.visibility = "hidden";
		document.getElementById('menu6').style.visibility = "hidden";


		document.getElementById('CloserLayer').style.visibility = "hidden";
	}
}

function pop(url) {
  link = window.open(url,"pop","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=660,height=500,left=25,top=25");
}

function ToggleBox(obj)
{
  var el = document.getElementById(obj);
  if (el.style.display != 'none')
  {
            el.style.display = 'none';
  }
  else
  {
    el.style.display = '';
  }
  return true;
}

//v1.0
//Copyright 2006 Adobe Systems, Inc. All rights reserved.
function AC_AddExtension(src, ext)
{
  if (src.indexOf('?') != -1)
    return src.replace(/\?/, ext+'?'); 
  else
    return src + ext;
}

function AC_Generateobj(objAttrs, params, embedAttrs) 
{ 
  var str = '<object ';
  for (var i in objAttrs)
    str += i + '="' + objAttrs[i] + '" ';
  str += '>';
  for (var i in params)
    str += '<param name="' + i + '" value="' + params[i] + '" /> ';
  str += '<embed ';
  for (var i in embedAttrs)
    str += i + '="' + embedAttrs[i] + '" ';
  str += ' ></embed></object>';

  document.write(str);
}

function AC_FL_RunContent(){
  var ret = 
    AC_GetArgs
    (  arguments, ".swf", "movie", "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"
     , "application/x-shockwave-flash"
    );
  AC_Generateobj(ret.objAttrs, ret.params, ret.embedAttrs);
}

function AC_SW_RunContent(){
  var ret = 
    AC_GetArgs
    (  arguments, ".dcr", "src", "clsid:166B1BCA-3F9C-11CF-8075-444553540000"
     , null
    );
  AC_Generateobj(ret.objAttrs, ret.params, ret.embedAttrs);
}

function AC_GetArgs(args, ext, srcParamName, classid, mimeType){
  var ret = new Object();
  ret.embedAttrs = new Object();
  ret.params = new Object();
  ret.objAttrs = new Object();
  for (var i=0; i < args.length; i=i+2){
    var currArg = args[i].toLowerCase();    

    switch (currArg){	
      case "classid":
        break;
      case "pluginspage":
        ret.embedAttrs[args[i]] = args[i+1];
        break;
      case "src":
      case "movie":	
        args[i+1] = AC_AddExtension(args[i+1], ext);
        ret.embedAttrs["src"] = args[i+1];
        ret.params[srcParamName] = args[i+1];
        break;
      case "onafterupdate":
      case "onbeforeupdate":
      case "onblur":
      case "oncellchange":
      case "onclick":
      case "ondblClick":
      case "ondrag":
      case "ondragend":
      case "ondragenter":
      case "ondragleave":
      case "ondragover":
      case "ondrop":
      case "onfinish":
      case "onfocus":
      case "onhelp":
      case "onmousedown":
      case "onmouseup":
      case "onmouseover":
      case "onmousemove":
      case "onmouseout":
      case "onkeypress":
      case "onkeydown":
      case "onkeyup":
      case "onload":
      case "onlosecapture":
      case "onpropertychange":
      case "onreadystatechange":
      case "onrowsdelete":
      case "onrowenter":
      case "onrowexit":
      case "onrowsinserted":
      case "onstart":
      case "onscroll":
      case "onbeforeeditfocus":
      case "onactivate":
      case "onbeforedeactivate":
      case "ondeactivate":
      case "type":
      case "codebase":
        ret.objAttrs[args[i]] = args[i+1];
        break;
      case "width":
      case "height":
      case "align":
      case "vspace": 
      case "hspace":
      case "class":
      case "title":
      case "accesskey":
      case "name":
      case "id":
      case "tabindex":
        ret.embedAttrs[args[i]] = ret.objAttrs[args[i]] = args[i+1];
        break;
      default:
        ret.embedAttrs[args[i]] = ret.params[args[i]] = args[i+1];
    }
  }
  ret.objAttrs["classid"] = classid;
  if (mimeType) ret.embedAttrs["type"] = mimeType;
  return ret;
}