/*  handles a required field  */
function isRequired(oFormField, errMsg) {
	var result = hasValue(oFormField);
	if( result == false ) {
		
		if( oFormField.type == undefined && oFormField.length > 0 ) {
			//return reportError(oFormField[0], errMsg);
			alert(errMsg);
			oFormField[0].focus();
		}
		else {
			return reportError(oFormField, errMsg);
		}
	}
	else if( result == 'exception' ) {
		return false;
	}
	return true;
}

/*  display errors  */
function reportError(oFormField,errMsg){
	// SHOW THE ALERT AND GIVE FOCUS TO THE ERROR FIELD
	alert(errMsg);
	if(oFormField.type!='hidden'){
		oFormField.focus();
	}
	return false;
}

/*  returns boolean based on whether or not element has value  */
function hasValue(oFormField) {
	if( oFormField.type == 'text' || oFormField.type == 'textarea' || oFormField.type == 'password' || oFormField.type == 'hidden' || oFormField.type == 'file' ) {
		if( oFormField.value.length != 0 ) {
			return true;
		}
		else {
			return false;
		}
	}
	else if( oFormField.type == 'select' || oFormField.type == 'select-one' || oFormField.type == 'select-multiple' ) {
		var cSelect = 0;
		for( i=0;i<oFormField.options.length;i++ ) {
			if( oFormField.options[i].selected ) {
				cSelect = 1;
				break;
			}
		}
		if( cSelect != 0 )
			return true;
		else
			return false;
	}
	else if( oFormField.type == 'checkbox' || oFormField.type == 'radio' ) {
		if( oFormField.checked == true )
			return true;
		else
			return false;
	}
	else if( oFormField.type == undefined && oFormField.length > 0 ) {
		var cGroup = 0;
		for( i=0;i<oFormField.length;i++ ) {
			if( oFormField[i].checked == true ) {
				cGroup = 1;
				break;
			}
		}
		if( cGroup != 0 )
			return true;
		else
			return false;
	}
	else {
		return -1;
	}
}

function isValidTrackingSystemEmail(oElem) {
	if( oElem.value.search(/^(([-a-zA-Z0-9_]+)@(([-a-zA-Z0-9_]+\.)*)([-a-zA-Z0-9]+\.)([a-zA-Z0-9]{2,7}))?$/) != -1 )
		return true;
	else
		return false;
}



/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}