<!--
function onlynum( e ) {
   var isNav4, isNav, isIE;
   if(event.keyCode==44) event.keyCode=46;
   if (parseInt(navigator.appVersion.charAt(0)) >= 4) {
      isNav = (navigator.appName=="Netscape") ? true : false;
      isIE = (navigator.appName.indexOf("Microsoft") != -1) ? true : false;
   }
   if (navigator.appName=="Netscape") {
      isNav4 = (parseInt(navigator.appVersion.charAt(0))==4);
   }
   var keyNumber = (isIE) ? event.keyCode : e.which;

   if( ( ( keyNumber < 48 ) || ( keyNumber > 57 ) ) && ( keyNumber != 13 ) &&
   ( keyNumber != "0" ) && ( keyNumber != 8 ) && ( keyNumber != 9 ) && ( keyNumber != 46 ) ) {
      if (isIE) event.keyCode=0;
      return false;
   }
}
//-->