function doEnterKeypressClick(buttonName,e)
{
//the purpose of this function is to allow the enter key to 
//point to the correct button to click.
    var key;
    if(window.event) 
        key = window.event.keyCode; //IE
    else {
          key = e.which; //firefox
          HTMLElement.prototype.click = function() {
            var evt = this.ownerDocument.createEvent('MouseEvents');
            evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
            this.dispatchEvent(evt);
        } 
    }
    if (key == 13)
    {
        //Get the button the user wants to have clicked
        var btn = document.getElementById(buttonName);
        if (btn != null)
        { //If we find the button click it
            btn.click();
            if (window.event) 
                event.keyCode = 0
        }
    }
}