function trim(stringToTrim) {
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}

function validate() {

	var df = document.pubreq;
	var bHasAtLeastOneOrder = false;
	var bAllOrdersNumeric = true;
	var arFields = new Array(); 
	var value;
	var k = 0;
	
	// Hide all error messages.
	document.getElementById('pub').style.visibility = 'hidden';
	document.getElementById('number').style.visibility = 'hidden';
	document.getElementById('invalid').style.visibility = 'hidden';
	document.getElementById('invalidzip').style.visibility = 'hidden';
	
	// List all the fields.
	arFields[k] = df.Student1; k++;
	arFields[k] = df.Student2; k++;
	arFields[k] = df.Student3; k++;
	arFields[k] = df.Student4; k++;
	arFields[k] = df.Student5; k++;
	arFields[k] = df.Student6; k++;
	arFields[k] = df.Student7; k++;
	arFields[k] = df.Student8; k++;
	arFields[k] = df.Student9; k++;
	arFields[k] = df.StudentA; k++;
	arFields[k] = df.StudentB; k++;
	arFields[k] = df.Student10; k++;
	arFields[k] = df.Student11; k++;
	arFields[k] = df.Student12; k++;
	arFields[k] = df.Student13; k++;
	arFields[k] = df.Student14; k++;
	arFields[k] = df.Student17; k++;
	arFields[k] = df.Student18; k++;
	arFields[k] = df.Counselor1; k++;
	arFields[k] = df.Counselor2; k++;
	arFields[k] = df.Counselor3; k++;
	arFields[k] = df.Counselor4; k++;
	arFields[k] = df.Counselor12; k++;
	arFields[k] = df.Administrator1; k++;
	arFields[k] = df.Administrator2; k++;
	arFields[k] = df.Administrator3; k++;
	arFields[k] = df.Administrator4; k++;
	arFields[k] = df.Administrator5; k++;
	arFields[k] = df.Administrator6; k++;
	arFields[k] = df.Administrator7; k++;
	arFields[k] = df.Administrator10; k++;
	arFields[k] = df.Administrator11; k++;		// Spanish language order, out of state
	arFields[k] = df.Administrator12; k++;		// Spanish language order, out of state
	arFields[k] = df.Administrator13; k++;
	arFields[k] = df.Administrator14; k++;
	arFields[k] = df.Administrator15; k++;
	arFields[k] = df.Administrator16; k++;
	arFields[k] = df.Administrator20; k++;
	
	for (j=0; j < arFields.length; j++) {
		if (typeof arFields[j] != "undefined") {
			if (arFields[j].value) { 
				value = trim(arFields[j].value);
				if (value != "") { 	// Tests all publication boxes for a value in at least one.
					bHasAtLeastOneOrder = true;
					// Tests all publication boxes to verify values are numeric.
					for (i=0; i<=value.length-1; i++)  if("0123456789".indexOf(value.charAt(i))==-1) { 
						bAllOrdersNumeric = false;
						break;
						}
					}
				}
			}
		}

	if (!bHasAtLeastOneOrder) {	// Not one box had a value.
		document.getElementById('pub').style.visibility = 'visible';
			document.location = '#pub';
			return false;
		}
		
	if (!bAllOrdersNumeric) {		// At least one box had a non-numeric value.
		document.getElementById('number').style.visibility = 'visible';
			document.location = '#number';
			return false;
		}

	// tests form for values 
	if(!df.PersonName.value || !df.Street.value || !df.City.value || !df.Zip.value){
	   document.getElementById('invalid').style.visibility = 'visible';
			document.location = '#invalid';
	   return false;
	}

	// test for zip code using regular exp
	if(df.Zip.value.search(/^[0-9]{5}$/)==-1){
	   document.getElementById('invalidzip').style.visibility = 'visible';
			document.location = '#invalidzip';
	   return false;
	}
	
}