function isBlank(s) {
	var flag = true;
	for (var i=0; i<s.length; i++) {
	    var c = s.charAt(i);
	    if ((c != ' ') && (c != '\n') && (c != '')) {
		flag = false;
		i = s.length;
	    }
	}
	return flag;
    }

function validateForm(f) {
    var flag = true;
    for (var i=0; i<f.length; i++) {
	var e = f.elements[i];
	if ((e.value == null) || (e.value == "") || isBlank(e.value)) {
	    flag = false;
	    i = f.length;
	}
    }
    if (flag == false) {
	alert("Sorry, please fill out all fields in the form so that we can " +
	      "process your request.");
    }
    return flag;
}