// A utility function that returns true if 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 and textarea elements that don't have an "optional" property
			// defined.  Then, check for fields that are empty and make a list of them.
			// Also, if any of these elements have a "min" or a "max" property defined,
			// then verify that they are numbers and that they are in the right range.
			// Put together error messages 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.type == "radio") || (e.type == "password"))  && !e.optional) {
					// first check if the field is empty
					if ((e.value == null) ||  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.max != 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 required fields were not filled.\n";
		msg += "Please correct these field(s) and re-submit.";
	
		alert(msg);
		return false;
	}

function checkEmailAddress(field){
		var goodEmail = false;
		if(field.value != '') {
			goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.se)|(\.nu)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
		}
		if (goodEmail){
		   good = true
		} else {
		   alert('Invalid email address.')
		   field.focus()
		   field.select()
		   good = false
		}
		return good;
}