function imgChangeInc(selectObj){
	// get index of selected bulb 
	var idx = selectObj.selectedIndex;
	
	// get value of selected index 
	 var which = selectObj.options[idx].value;
	 
	 // change image 
	 insertNewImageInc(which);
	 
}
function insertNewImageInc(val){
	 var imageArr = new Array();	
	imageArr["60 Watt-Soft White-860 Lumens"] = ["31-SW-60W-860lu"];
	 imageArr["60 Watt-Daylight-630 Lumens"] = ["33-SW-60W-630lu"];
	 imageArr["75 Watt-Soft White-1180 Lumens"] = ["24-75W-SW-1180-lu"];
	 imageArr["75 Watt-Daylight-830 Lumens"] = ["28-75W-830lu"];
	 imageArr["14 Watt-Soft White-900 Lumens"] = ["14-CFL-14W-86lu"];
	 imageArr["14 Watt-Daylight-630 Lumens"] = ["17-CFL-D-14W-630-lu"];
	 imageArr["19 Watt-Soft White-1200 Lumens"]= ["25-CFL-19W-1200lu"];
	 imageArr["19 Watt-Daylight-840 Lumens"] = ["27-CFL-D-19W-840lu"];
	 
	 imgHolder = document.getElementById('incan');
	 imgHolder.src = "../images/comparison/" + imageArr[val] + ".jpg";
	
}

function imgChangeCfl(selectObj){
	// get index of selected bulb 
	var idx = selectObj.selectedIndex;
	
	// get value of selected index 
	 var which = selectObj.options[idx].value;
	 
	 // change image 
	 insertNewImageCfl(which);
	 
}
function insertNewImageCfl(val){
	 var imageArr = new Array();	
	 imageArr["60 Watt-Soft White-860 Lumens"] = ["31-SW-60W-860lu"];
	 imageArr["60 Watt-Daylight-630 Lumens"] = ["33-SW-60W-630lu"];
	 imageArr["75 Watt-Soft White-1180 Lumens"] = ["24-75W-SW-1180-lu"];
	 imageArr["75 Watt-Daylight-830 Lumens"] = ["28-75W-830lu"];
	 imageArr["14 Watt-Soft White-900 Lumens"] = ["14-CFL-14W-86lu"];
	 imageArr["14 Watt-Daylight-630 Lumens"] = ["17-CFL-D-14W-630-lu"];
	 imageArr["19 Watt-Soft White-1200 Lumens"]= ["25-CFL-19W-1200lu"];
	 imageArr["19 Watt-Daylight-840 Lumens"] = ["27-CFL-D-19W-840lu"];
	 
	 imgHolder = document.getElementById('cflimg');
	 imgHolder.src = "../images/comparison/" + imageArr[val] + ".jpg";
	
}