function submitForm( formname ){
	
  eval_str = 'document.' + formname + '.submit();';
  eval( eval_str );

}

function modifyAction( formname, action ){

  eval_str = 'document.' + formname + '.action = \'' + action + '\'';
  eval( eval_str );
	
}

function setBookingValues( amount, vid, gid ){

document.main_form.amount.value = amount;	
document.main_form.vid.value = vid;
document.main_form.gid.value = gid;

}