/* Function to toggle display for Confirmed Sponsors and Exhibitors */

//Functions to toggle display
function toggleDisplay(whichLayer) {
	if(document.getElementById(whichLayer).style.display == 'block') {
		document.getElementById(whichLayer).style.display = 'none';
		document.getElementById(whichLayer + '_open').style.background = "url(/conference/components/img/arrow_right_rev.gif) 0% 50% no-repeat";
	}else{
		document.getElementById(whichLayer).style.display = 'block';
		document.getElementById(whichLayer + '_open').style.background = "url(/conference/components/img/arrow_down_rev.gif) 0% 50% no-repeat";
	}
}

//Functions to toggle display
function toggleDisplay2(whichLayer) {
	if(document.getElementById(whichLayer).style.display == 'block') {
		document.getElementById(whichLayer).style.display = 'none';
		document.getElementById(whichLayer + '_open2').style.background = "url(/conference/components/img/arrow_right_rev.gif) 0% 20% no-repeat";
	}else{
		document.getElementById(whichLayer).style.display = 'block';
		document.getElementById(whichLayer + '_open2').style.background = "url(/conference/components/img/arrow_down_rev.gif) 0% 20% no-repeat";
	}
}

/* -------Below is javascript from 2009 conference - may not be needed */
/* Header image rotation script */

var theImages = new Array() 

theImages[0] = '/conference/components/img/headers/img1.jpg'
theImages[1] = '/conference/components/img/headers/img2.jpg'
theImages[2] = '/conference/components/img/headers/img3.jpg'
theImages[3] = '/conference/components/img/headers/img4.jpg'
theImages[4] = '/conference/components/img/headers/img5.jpg'
theImages[5] = '/conference/components/img/headers/img6.jpg'
theImages[6] = '/conference/components/img/headers/img7.jpg'
theImages[7] = '/conference/components/img/headers/img8.jpg'
theImages[8] = '/conference/components/img/headers/img9.jpg'

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+theImages[whichImage]+'" width="600" height="200" alt="The 27th Annual Options Industry Conference in Weston, Florida" />');
}

/* Image Rollovers */

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];}
}

<!-- Window Pop-Up center -->
function NewWindow(mypage, myname, w, h, scroll, tools)
{
   var winl = (screen.width - w) / 2;
   var wint = (screen.height - h) / 2;
   winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable,menubar='+tools;
   win = window.open(mypage, myname, winprops);
   if (parseInt(navigator.appVersion) >= 4)
   {
      win.window.focus();
   }
}

<!-- Validation Scripts -->
function isValidEmail(text)	{
	var reEmail = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/;
	return reEmail.test(text);
}
function checkForm(f)	{
	bSuccess = true;
	var error = "";

	if ((f.name.value == "Name") || (f.name.value == "")) {
		error += "Please provide your name.\n";
		bSuccess = false;
	}

	if ((f.email.value != "Email Address") || (f.email.value == "")) {
		if (!isValidEmail(f.email.value)) {
			error += "Please provide your valid email address.\n";
			bSuccess = false;
		}
	} else {
		error += "Please provide your email address.\n";
		bSuccess = false;
	}

	if (bSuccess == false) {
		alert(error);
		return bSuccess;
	}
}

<!--Clear Form Fields onFocus -->
function clearDefault(el)
{
  if (el.defaultValue==el.value) el.value = "";
}

<!--Media Partners Rotation -->
	var mUrl = new Array() 
	
	mUrl[0] = 'http://www.tradersmagazine.com/'
	mUrl[1] = 'http://www.totalalternatives.com/'
	mUrl[2] = 'http://www.hedgeworld.com/'
	mUrl[3] = 'http://www.onn.tv/'
	mUrl[4] = 'http://www.fointelligence.com/'
	mUrl[5] = 'http://www.fow.com/'
	mUrl[6] = 'http://www.futuresmag.com/'
	mUrl[7] = 'http://www.marketsmediaonline.com/'
	mUrl[8] = 'http://online.wsj.com/public/us'
	mUrl[9] = 'http://www.wallstreetletter.com/'
	mUrl[10] = 'http://theoptionsinsider.com/'
	mUrl[11] = 'http://www.iiderivatives.com/'

  if (document.images)
   {
     image_off= new Image(220,50);
     image_off.src="/conference/components/img/media/logo_off.gif";  
     tm= new Image(220,50);
     tm.src="/conference/components/img/media/logo_tm.gif";
     ain= new Image(220,50);
     ain.src="/conference/components/img/media/logo_ain.gif";  
     hedgeworld= new Image(220,50);
     hedgeworld.src="/conference/components/img/media/logo_hedgeworld_sm.jpg"; 
	 onn= new Image(220,50);
     onn.src="/conference/components/img/media/logo_onn_sm.jpg";  
     dw= new Image(220,50);
     dw.src="/conference/components/img/media/logo_dw.gif";  
     foi= new Image(220,50);
     foi.src="/conference/components/img/media/logo_foi1.jpg";  
     fow= new Image(220,50);
     fow.src="/conference/components/img/media/logo_fow1.jpg";   
     wsl= new Image(220,50);
     wsl.src="/conference/components/img/media/logo_wsl.gif"; 
     mm= new Image(220,50);
     mm.src="/conference/components/img/media/logo_mm.gif"; 
     fm= new Image(220,50);
     fm.src="/conference/components/img/media/logo_fm.gif"; 
	 wsj= new Image(220,50);
     wsj.src="/conference/components/img/media/logo_wsj.gif"; 
	 toi= new Image(220,50);
     toi.src="/conference/components/img/media/logo_toi.gif"; 
   }

function changePartner(picName,imgName,mName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + ".src");
      document[picName].src= imgOn;
	  document.getElementById('mlink').href= mUrl[mName];
    }
 }