function changementCouleur(){
		var selectedMode = document.getElementById("mode").value;
		
		if(selectedMode == "DRIVING"){
			document.getElementById("voiture").style.background = 'url(images/interface/contact/voitureOn.png) no-repeat';
			document.getElementById("pieton").style.background = 'url(images/interface/contact/pieton.png) no-repeat';
			document.getElementById("velo").style.background = 'url(images/interface/contact/velo.png) no-repeat';
		}
		
		if(selectedMode == "WALKING"){
			document.getElementById("voiture").style.background = 'url(images/interface/contact/voiture.png) no-repeat';
			document.getElementById("pieton").style.background = 'url(images/interface/contact/pietonOn.png) no-repeat';
			document.getElementById("velo").style.background = 'url(images/interface/contact/velo.png) no-repeat';
		}
		
		if(selectedMode == "BICYCLING"){
			document.getElementById("voiture").style.background = 'url(images/interface/contact/voiture.png) no-repeat';
			document.getElementById("pieton").style.background = 'url(images/interface/contact/pieton.png) no-repeat';
			document.getElementById("velo").style.background = 'url(images/interface/contact/veloOn.png) no-repeat';
		}
			
			
	}