function change_ajandektargyak(value) {
    document.getElementById('preatty_a').href=value;
    document.getElementById('preatty_img').src=value;
}

function ajandektargyak_onload() {
    var minelink = document.getElementById('minelink');
    var selectBox = document.getElementById('thisselect');
    for (var i = 0; i < selectBox.options.length; i++) {  
     if ( selectBox.options[i].value == minelink.value)
        selectBox.options[i].selected = true;
 }
}