/* script for tab change */

// tab change
function chgTab (tgt,id,img){
    var tgtTab = document.getElementById(tgt + "Tab");
    var tgtCnt = document.getElementById(tgt + "Cnt");
    var menu = id.split(",");
    for (var i=0; i<menu.length; i++){
        document.getElementById(menu[i] + "Tab").style.backgroundPosition = "left top";
        document.getElementById(menu[i] + "Cnt").style.display = "none";
    }
    tgtTab.style.backgroundPosition = "left bottom";
    tgtCnt.style.display = "block";
}