function fields() {
    var i;
    for (i = 1 ; i <= 20; i++) {
        //convert i into string
        var j = i.toString();
        var obj = "new_field" + j;
        alert(obj);

        Xrm.Page.ui.controls.get(obj).setVisible( false);
    }
}




SOURCE : JUST2CODE.IN
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