<!--
	// A utility funtion that returns true of a string contains only
	// whitespace characters
	function isblank(s)
	{
		for(var i = 0; i < s.length; i++)
		{
			var c = s.charAt(i);
			if((c != ' ') && (c != '\n') && (c != '\t')) return false;
		}
		return true;
	}

	// This is the function that performs form verification. It will be invoked
	// from the onSubmit() event handler. The handler should return whatever
	// value this function returns.
	function verify(f)
	{
		var msg;
		var empty_fields = "";
		var errors = "";

		// Loop through the elements of the form, looking for all
		// text, textarea, and select elements that don't have an "optional" property
		// defined. Then, check for fields that are empty and make a list of them.
		// If the element has a "numeric" property defined, verify that
		// it is a number, but don't check it's range.
		// Put together error message for fields that are wrong.
		for(var i = 0; i < f.length; i++)
		{
			var e = f.elements[i];

			if(((e.type == "text") || (e.type == "textarea")) && !e.optional)
			{
             	// first check to see if the field is empty
				if((e.value == null) || (e.value == "") || isblank(e.value))
				{
                 	empty_fields += "\n          " + e.name;
					continue;
				}
				// now check for fields that are supposed to be numeric.
				if(e.numeric || (e.min != null) || (e.maxx != null))
				{
					var v = parseFloat(e.value);
					if(isNaN(v) ||
						((e.min != null) && (v < e.min)) ||
						((e.max != null) && (v > e.max)))
					{
						errors += " - The field " + e.name + " must be a number";
						if(e.min != null)
							errors += " that is greater than " + e.min;
						if(e.max != null && e.min != null)
							errors += " and less than " + e.max;
						else if(e.max != null)
							errors += " that is less than " + e.max;
						errors += ".\n";
					}
				}
			}
		}
		// Now, if there were any errors, display the messages, and
		// return false to prevent the form from being submitted.
		// Otherwise, return true.
		if(!empty_fields && !errors) return true;

		msg = "The form was not submitted because of the following error(s).\n";
		msg += "Please correct these error(s) and resubmit.\n";
		if(empty_fields)
		{
			msg += "- The following required field(s) are empty:" + empty_fields + "\n";
			if(errors) msg += "\n";
		}
		msg += errors;
		alert(msg);
		return false;
	}
-->