function swap() {
var img = document.getElementById("1");
img.src = "images/buttons/webview_but_over.jpg";
}

function reset() {
var img = document.getElementById("1");
img.src = "images/buttons/webview_but.jpg";
}

function swap2() {
var img = document.getElementById("2");
img.src = "images/buttons/school_but_over.jpg";
}

function reset2() {
var img = document.getElementById("2");
img.src = "images/buttons/school_but.jpg";
}

function swap3() {
var img = document.getElementById("3");
img.src = "images/buttons/student_but_over.jpg";
}

function reset3() {
var img = document.getElementById("3");
img.src = "images/buttons/student_but.jpg";
}

function swap4() {
var img = document.getElementById("4");
img.src = "images/buttons/business_but_over.jpg";
}

function reset4() {
var img = document.getElementById("4");
img.src = "images/buttons/business_but.jpg";
}

function swap5() {
var img = document.getElementById("5");
img.src = "images/buttons/email_us_over.jpg";
}

function reset5() {
var img = document.getElementById("5");
img.src = "images/buttons/email_us.jpg";
}

function swap6() {
var img = document.getElementById("6");
img.src = "images/buttons/vol_online_but_over.jpg";
}

function reset6() {
var img = document.getElementById("6");
img.src = "images/buttons/vol_online_but.jpg";
}

function swap7() {
var img = document.getElementById("7");
img.src = "images/buttons/offer-workexperience-btn-on.jpg";
}

function reset7() {
var img = document.getElementById("7");
img.src = "images/buttons/offer-workexperience-btn.jpg";
}