function f_changeFondRouge()
{
	
	// modif body
	var baliseBody = document.getElementsByTagName('body');
	baliseBody[0].removeAttribute('id');
	baliseBody[0].setAttribute('id','themeRouge');
	// modif general
	var divHeader = document.getElementById('header');
	var divGeneral = divHeader.parentNode;
	divGeneral.removeAttribute('id');
	divGeneral.setAttribute('id','generalRouge');
}

function f_changeFondJaune()
{
	// modif body
	var baliseBody = document.getElementsByTagName('body');
	baliseBody[0].removeAttribute('id');
	baliseBody[0].setAttribute('id','themeJaune');
	// modif general
	var divHeader = document.getElementById('header');
	var divGeneral = divHeader.parentNode;
	divGeneral.removeAttribute('id');
	divGeneral.setAttribute('id','generalJaune');
}

function f_changeFondVert()
{	
	// modif body
	var baliseBody = document.getElementsByTagName('body');
	baliseBody[0].removeAttribute('id');
	baliseBody[0].setAttribute('id','themeVert');
	// modif general
	var divHeader = document.getElementById('header');
	var divGeneral = divHeader.parentNode;
	divGeneral.removeAttribute('id');
	divGeneral.setAttribute('id','generalVert');
}

function f_changeFondBleu()
{
	// modif body
	var baliseBody = document.getElementsByTagName('body');
	baliseBody[0].removeAttribute('id');
	baliseBody[0].setAttribute('id','themeBleu');
	// modif general
	var divHeader = document.getElementById('header');
	var divGeneral = divHeader.parentNode;
	divGeneral.removeAttribute('id');
	divGeneral.setAttribute('id','general');
}