// functions for toggling ib buoy averaged vs hourly

function toggleElement(elid,a,b) { 
  var el = document.getElementById(elid);
  if( !el ) { 
    return;
  }
  if( el.src == a ) { 
    el.src = b;
  } else { 
    el.src = a;
  }
}

function registerClick() { 
  var elid = "buoyToggle";
  var el = document.getElementById(elid);
  if( !el ) { 
    return;
  }
  el.onclick = function() { 
    var a = 'ibwcBuoy_currents.jpg';
    var b = 'ibwcBuoy_avgCurrents.jpg';
    var c = String(this.src).split('/');
    c = c.pop();
    if( c == a ) { 
      this.src = 'plots/'+b;
    } else { 
      this.src = 'plots/'+a;
    }
  }
}

window.onload = registerClick;