urlエンコード(javascript)

function button1_onclick() {
    text2.value = escape(text1.value);
    text2.value = encodeURI(text1.value);
    text2.value = encodeURIComponent(text1.value);
}

function button2_onclick() {
    text3.value = unescape(text2.value);
    text3.value = decodeURI(text2.value);
    text3.value = decodeURIComponent(text2.value);
}