var offImgArray = new Array();
offImgArray["projects"] = new Image(89,40);
offImgArray["about"] = new Image(89,40);
offImgArray["team"] = new Image(89,40);
offImgArray["contact"] = new Image(89,40);
offImgArray["prj_first_arrow"] = new Image(13,14);
offImgArray["prj_left_arrow"] = new Image(13,14);
offImgArray["prj_right_arrow"] = new Image(13,14);
offImgArray["prj_left_arrow2"] = new Image(13,14);
offImgArray["prj_right_arrow2"] = new Image(13,14);

offImgArray["projects"].src = "images/buttons/main_projects_off.jpg";
offImgArray["about"].src = "images/buttons/main_about_off.jpg";
offImgArray["team"].src = "images/buttons/main_team_off.jpg";
offImgArray["contact"].src = "images/buttons/main_contact_off.jpg";
offImgArray["prj_first_arrow"].src = "images/buttons/prj_first_arrow_off.jpg";
offImgArray["prj_left_arrow"].src = "images/buttons/prj_left_arrow_off.jpg";
offImgArray["prj_right_arrow"].src = "images/buttons/prj_right_arrow_off.jpg";
offImgArray["prj_left_arrow2"].src = "images/buttons/prj_left_arrow2_off.jpg";
offImgArray["prj_right_arrow2"].src = "images/buttons/prj_right_arrow2_off.jpg";

var onImgArray = new Array();
onImgArray["projects"] = new Image(89,40);
onImgArray["about"] = new Image(89,40);
onImgArray["team"] = new Image(89,40);
onImgArray["contact"] = new Image(89,40);
onImgArray["prj_first_arrow"] = new Image(13,14);
onImgArray["prj_left_arrow"] = new Image(13,14);
onImgArray["prj_right_arrow"] = new Image(13,14);
onImgArray["prj_left_arrow2"] = new Image(13,14);
onImgArray["prj_right_arrow2"] = new Image(13,14);

onImgArray["projects"].src = "images/buttons/main_projects_on.jpg";
onImgArray["about"].src = "images/buttons/main_about_on.jpg";
onImgArray["team"].src = "images/buttons/main_team_on.jpg";
onImgArray["contact"].src = "images/buttons/main_contact_on.jpg";
onImgArray["prj_first_arrow"].src = "images/buttons/prj_first_arrow_on.jpg";
onImgArray["prj_left_arrow"].src = "images/buttons/prj_left_arrow_on.jpg";
onImgArray["prj_right_arrow"].src = "images/buttons/prj_right_arrow_on.jpg";
onImgArray["prj_left_arrow2"].src = "images/buttons/prj_left_arrow2_on.jpg";
onImgArray["prj_right_arrow2"].src = "images/buttons/prj_right_arrow2_on.jpg";


function imageOn(imageName) {
	document.images[imageName].src = onImgArray[imageName].src;
}

function imageOff(imageName) {
	document.images[imageName].src = offImgArray[imageName].src;
}