function onError(obj,message)
    {
	alert(message);
    obj.focus();
	return false;	
    }	
	
function isNull(obj)
	{
	return !obj.value.replace(/^\s+/g, '').replace(/\s+$/g, '').length;
	}	

function isChecked(obj)
	{
	alert(obj.length);
	
	for (i=0; i<obj.length; i++)
		{
		alert(obj[i].checked);
			return true;
		if (obj[i].checked) return true;
		}
	return false;	
	}
	
function isSelected(obj)
	{
	return (obj.selectedIndex > 0);
	}
	
function isEmail(sEmailObj)
	{
	var str    = sEmailObj.value;
	var reg   = /^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/;
   return (reg.test(str));
	}