function doClick(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


    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();
            event.keyCode = 0
        }
    }
}