function handleEnter(field, event) {
    var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
    if (keyCode == 13) {
        var i;
        for (i = 0; i < field.form.elements.length; i++)
        if (field == field.form.elements[i]) {
            break;
        }
        i = (i + 1) % field.form.elements.length;
        field.form.elements[i].focus();
        return false;
    }   
    else
    {
        return true;
    }
}
function agreesubmit(el){  
    var checkobj=el;
    if (document.all||document.getElementById){
        for (i=0;i<checkobj.form.length;i++){
            var tempobj=checkobj.form.elements[i];
            if(tempobj.type.toLowerCase()=="submit") {
                tempobj.disabled=!checkobj.checked;
            }
        }
    }
}

function submitonce(theform){  
  if (document.all||document.getElementById){  
    for (i=0;i<theform.length;i++){  
      var tempobj=theform.elements[i]  
      if(tempobj.type.toLowerCase()=="submit"||tempobj.type.toLowerCase()=="reset")  
        tempobj.disabled=true  
    }  
  }  
  else  
  return false  
}