How can i Enablieor disable form object by passing flag as parameter to javascript function

function EnableDisableControls(flag) {
    var hdnChkBox = document.getElementById("hdnChkBox").value;
    var chkCheckBox = document.getElementById(hdnChkBox);
    var hdnTextBox = document.getElementById("hdnTextBox").value;
    var txtTextBox = document.getElementById(hdnTextBox);
            
    chkCheckBox.disabled = flag;
    txtTextBox.disabled = flag;
          
}