div.thankyou {
    width: 160px;
    height: 120px;
    display: block;
    cursor: pointer;
}

div.thankyou_1 {
    background: url('../images/envelopes/env1.gif') no-repeat;
}

div.thankyou_2 {
    background: url('../images/envelopes/env2.gif') no-repeat;
}

div.thankyou_3 {
    background: url('../images/envelopes/env3.gif') no-repeat;
}

div.thankyou_4 {
    background: url('../images/envelopes/env4.gif') no-repeat;
}

div.thankyou_5 {
    background: url('../images/envelopes/env5.gif') no-repeat;
}

div.thankyou_6 {
    background: url('../images/envelopes/env6.gif') no-repeat;
}

div.thankyou_7 {
    background: url('../images/envelopes/env7.gif') no-repeat;
}

div.thankyou_8 {
    background: url('../images/envelopes/env8.gif') no-repeat;
}

div.thankyou_9 {
    background: url('../images/envelopes/env9.gif') no-repeat;
}

div.thankyou_10 {
    background: url('../images/envelopes/env10.gif') no-repeat;
}

div.thankyou_11 {
    background: url('../images/envelopes/env11.gif') no-repeat;
}

div.thankyou_12 {
    background: url('../images/envelopes/env12.gif') no-repeat;
}

div.thankyou_13 {
    background: url('../images/envelopes/env13.gif') no-repeat;
}

div.thankyou_14 {
    background: url('../images/envelopes/env14.gif') no-repeat;
}

div.thankyou_15 {
    background: url('../images/envelopes/env15.gif') no-repeat;
}

div.thankyou_16 {
    background: url('../images/envelopes/env16.gif') no-repeat;
}

div.thankyou_17 {
    background: url('../images/envelopes/env17.gif') no-repeat;
}

div.thankyou_18 {
    background: url('../images/envelopes/env18.gif') no-repeat;
}

div.thankyou_19 {
    background: url('../images/envelopes/env19.gif') no-repeat;
}

div.thankyou_20 {
    background: url('../images/envelopes/env20.gif') no-repeat;
}

div.thankyou_21 {
    background: url('../images/envelopes/env21.gif') no-repeat;
}

div.thankyou_22 {
    background: url('../images/envelopes/env22.gif') no-repeat;
}

div.thankyou_23 {
    background: url('../images/envelopes/env23.gif') no-repeat;
}

div.thankyou_24 {
    background: url('../images/envelopes/env24.gif') no-repeat;
}

div.thankyou_25 {
    background: url('../images/envelopes/env25.gif') no-repeat;
}

div.thankyou_26 {
    background: url('../images/envelopes/env26.gif') no-repeat;
}

div.thankyou_27 {
    background: url('../images/envelopes/env27.gif') no-repeat;
}

div.thankyou_28 {
    background: url('../images/envelopes/env28.gif') no-repeat;
}

div.thankyou_29 {
    background: url('../images/envelopes/env29.gif') no-repeat;
}

div.thankyou_30 {
    background: url('../images/envelopes/env30.gif') no-repeat;
}