var showFocus = function(id) {
    for (i = 1; i < 5; i++) {
        $('ctl00_ContentPlaceHolder1_Img_A' + i).setStyle('display','none');
    }
    $('ctl00_ContentPlaceHolder1_Img_A' + id).setStyle('display', 'block');


}
var tab = function(id) {
    for (i = 1; i < 4; i++) {
        $('tabId' + i).set('class', 'ty_t_2');
    }
    $('tabId' + id).set('class', 'ty_t_2 current');
    for (i = 1; i < 4; i++) {
        $('ctl00_ContentPlaceHolder1_pct' + i).set('class', 'info_con  hidden');
    }
    $('ctl00_ContentPlaceHolder1_pct' + id).set('class', 'info_con');
}