function preload()
		{
			folder = arguments[0];
					
			for (var i = 1 ; i < arguments.length ; i++)
			{
				eval(arguments[i] + '_on = new Image()')
				eval(arguments[i] + '_on.src = "' + folder + arguments[i] + '_on.gif"')
				eval(arguments[i] + '_off = new Image()')
				eval(arguments[i] + '_off.src = "' + folder + arguments[i] + '_off.gif"')
			}
		}

	// Initialisation des images de navhaut
	//preload('<< rep_source >>','<< nom_image >>', ..., ..., ....)