function stopSubmit() 
      {
        return false;
      }


 function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }

function letternumber(e)
      {
        var key;
        var keychar;

        if (window.event)
           key = window.event.keyCode;
        else if (e)
           key = e.which;
        else
           return true;
        keychar = String.fromCharCode(key);
        keychar = keychar.toLowerCase();

        // control keys
        if ((key==null) || (key==0) || (key==8) ||
            (key==9) || (key==13) || (key==27) )
           return true;

        // alphas and numbers
        else if ((("abcdefghijklmnopqrstuvwxyz0123456789").indexOf(keychar) > -1))
           return true;
        else
           return false;
     }

function emailvalidation(e)
    {
        var key;
        var keychar;

        if (window.event)
           key = window.event.keyCode;
        else if (e)
           key = e.which;
        else
           return true;
        keychar = String.fromCharCode(key);
        keychar = keychar.toLowerCase();

        // control keys
        if ((key==null) || (key==0) || (key==8) ||
            (key==9) || (key==13) || (key==27) )
           return true;

        // alphas and numbers and underscore,dot and at
        else if ((("abcdefghijklmnopqrstuvwxyz0123456789_@.").indexOf(keychar) > -1))
           return true;
        else
           return false;
   }