function Focus() {
var MyInput = document.getElementById('Username');
if(MyInput.value == 'Saisissez votre email')
  MyInput.value = '';
MyInput.style.color='#515151';
}

function Blur() {
var MyInput = document.getElementById('Username');
if(MyInput.value == '')
  {
  MyInput.style.color='#A8A8A8';
  MyInput.value = 'Saisissez votre email';
  }
}

function ShowPass(id) {
var MyInputPass = document.getElementById('Password');
var MyInputTxt = document.getElementById('PasswordTxt');

MyInputTxt.style.display = 'none';
MyInputPass.style.display = '';
MyInputPass.focus();
}

function RotateImage() {
var MyImage=document.getElementById('ImageToRotate');
DisplayedImage ++;
if(DisplayedImage > RefImages.length-1)
  DisplayedImage=0;
MyImage.src=RefImages[DisplayedImage].src;
setTimeout('RotateImage()', 3000);
}