function loadButtons()
{
	
	image1 = new Image();
	image1.src = 'images/demande_documentation_off.jpg';
	image2 = new Image();
	image2.src = 'images/demande_documentation_on.jpg';
}

function survoleImage(img) {
	
	if (img.className == 'off')
	{
		var chemin = img.src;
		x = chemin.indexOf('-off',0);
	
		if(x==-1)
		{
			x = chemin.indexOf('-on',0);
			chemin = chemin.substring(0,x);
			chemin = chemin + '-off.jpg';
		}
		else
		{
			chemin = chemin.substring(0,x);
			chemin = chemin + '-on.jpg';
		}
	
		img.src = chemin;
	}
}