function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;

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_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('Error\nPlease enter all information');
  document.MM_returnValue = (errors == '');
}

function addToFavorites() { if (window.external) { window.external.AddFavorite(urlAddress,pageName) 
} else { if (window.sidebar) { window.sidebar.addPanel(pageName, urlAddress,""); 
} } }

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

/* ---------- Homepage Banner Cycling ---------- */

var imageIndex = -1;

function Banner() 
{                    
    var banner = $('banner');
    if (banner != null)
    {
        var images = new Array(5);
        images[0] = 'images/banner_ankurshah.gif';
        images[1] = 'images/banner_daverichardson.gif';
        images[2] = 'images/banner_ianmarshall.gif';
        images[3] = 'images/banner_markbarnes.gif';
        images[4] = 'images/banner_nigeltaylor.gif';

        if(!banner.newimagediv)            
            banner.newimagediv = new Element('div').setStyles({'float': 'left', 'display': 'none', 'background-repeat': 'no-repeat', 'position': 'relative', 'margin': '0 0 20px 0', 'width':'944px','height':'239px','opacity':'0', 'z-index':'2'}).injectInside(banner);
        banner.newimagediv.setStyle('display', 'block');
        var fade = new Fx.Style(banner.newimagediv, 'opacity', {duration:500, transition: Fx.Transitions.linear});
        
        if(imageIndex < 0) imageIndex = Math.floor(Math.random() * images.length);     

        banner.newimagediv.setStyle('background-image','url(' + images[imageIndex] + ')');
        
        imageIndex++;
        if (imageIndex >= images.length) imageIndex = 0;
        
        fade.stop();    
        fade.start(1).chain(function()
        {
            banner.setStyle('background-image',banner.newimagediv.getStyle('background-image'));
            banner.newimagediv.setStyle('opacity', '0');      
            banner.newimagediv.setStyle('display', 'none');
        });        
        t = setTimeout('Banner()', 5000);
    }
}