// JavaScript Document // File: light_bulb.js // Purpose: Use getElementById to toggle a 'light switch' on and off function toggle_switch(){ //If the light is on the switch is enabled to turn it off and vice versa if (document.getElementById("light_switch").value=="Turn the lights on") { document.getElementById("bulb").src="images/LightBulbOnV2.gif"; //"bulb" is the ID of the image of the light bulb document.getElementById("body_list").style.backgroundColor = "#FFFFF0" //"body_list" is the ID of the tag document.getElementById("light_switch").value="Turn the lights off"; //"light_switch" is the ID of the } else { document.getElementById("bulb").src="images/LightBulbOffV2.gif"; document.getElementById("body_list").style.backgroundColor = "#666666" document.getElementById("light_switch").value="Turn the lights on"; } }