function clickButton(e,buttonid) {
    debugger;
    var bt = document.getElementById(buttonid);
    if (typeof(bt) == 'object') {
        if (navigator.appName.indexOf("Netscape") > -1) {
            if(e.keyCode == 13) {
                if (bt && typeof(bt.click) == 'undefined') {
                    bt.click =  addClickFunction1(bt);
                }
            }
        }
        if (navigator.appName.indexOf("Microsoft Internet Explorer") > -1) {
            if (event.keyCode == 13) {
                bt.click();
                return false;
            }
        }
    }
}

function addClickFunction1(bt) {
    debugger;
    var result = true;
    if (bt.onclick) result = bt.onclick();
    if (typeof(result) == 'undefined' || result) {
        eval(bt.href);
    }
}