var numericOnly = "0123456789";
var floatOnly = "0123456789.";
var alphaOnly = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
var noSpecialOnly = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
var dateDelimiterOnly = '/';

var errorColor = '#E77A18';
var defaultColor = '';


function validateMLSSearchEntries() {
	var allValid = true;
	
	if(!validateEntryExists('mls_id')) {
		allValid = false;
	}

	return allValid;
}


function validateSalesSearchEntries() {
	var allValid = true;
	
	if(!validateEntryExists('state')) {
		allValid = false;
	}
	
	if(!validateEntryExists('type')) {
		allValid = false;
	}
	
	if(!validateEntryExists('status')) {
		allValid = false;
	}

	return allValid;
}

function validateRentalsSearchEntries() {
	var allValid = true;
	
	if(!validateEntryExists('state')) {
		allValid = false;
	}
	
	if(!validateEntryExists('move_in_date')) {
		allValid = false;
	}

	return allValid;
}


function validateEntryExists(fieldName) {
	var allValid = true;
	var field = document.getElementById(fieldName);
	var input = field.value;
	var errormsg = 'Field \'' + field.name + '\' must contain a value.';
	
	if(input.length == 0) {
		allValid = false;
	}
	
	if(!allValid) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		return false;
	}
	
	field.style.backgroundColor = defaultColor;
	return true;


}

function resetFieldColor(field) {
	field.style.backgroundColor = defaultColor;
}


function validateFloatOnly(field) {
	var errormsg = 'Please enter only numeric characters in the \'' + field.name + '\' field.';
	var allValid = true;
	var input = field.value;
	var ch;
	
	for(i = 0;  i < input.length && allValid == true;  i++) {
		ch = input.charAt(i);

		if (floatOnly.indexOf(ch) == -1) {
			allValid = false;
        }
    }

	if(!allValid) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		return false;
	}
	
	field.style.backgroundColor = defaultColor;
	return true;
}


function validateNumericOnly(field) {
	var errormsg = 'Please enter only numeric characters in the \'' + field.name + '\' field. (i.e. no special characters, including \'.,*?$#@*&\', etc...)';
	var allValid = true;
	var input = field.value;
	var ch;
	
	for(i = 0;  i < input.length && allValid == true;  i++) {
		ch = input.charAt(i);

		if (numericOnly.indexOf(ch) == -1) {
			allValid = false;
        }
    }

	if(!allValid) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		return false;
	}
	
	field.style.backgroundColor = defaultColor;
	return true;
}


function validateAlphaOnly(field) {
	var errormsg = 'Please enter only alphabetic characters in the \'' + field.name + '\' field.';
	var allValid = true;
	var input = field.value;
	var ch;

	for(i = 0;  i < input.length && allValid == true;  i++) {
		ch = input.charAt(i);

		if (alphaOnly.indexOf(ch) == -1) {
			allValid = false;
        }
    }

	if(!allValid) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		return false;
	}
	
	field.style.backgroundColor = defaultColor;
	return true;
}

function validateFullDate(field) {
	var errormsg = 'Please enter a valid date in the \'' + field.name + '\' field. (i.e. 10/20/2007, 02/15/1999, etc...)';
	var allValid = true;
	var fullDate = field.value;
	count = 0;
	
	if(fullDate.length == 0) {
		field.style.backgroundColor = defaultColor;
		return true;
	}
	
	for(i = 0; i < fullDate.length; i++) {
		ch = fullDate.charAt(i);

		if(dateDelimiterOnly.charAt(0) == ch) {
			count++;
		}
	}
	
	if(count != 2) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}
	
	var date = new Date();
	var temp = new Array();
	
	temp = fullDate.split(dateDelimiterOnly.charAt(0));
		
	if(temp[0].length != 2 || temp[0] == 00) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}
	else {
	
		if(temp[0] == 12) {
			temp[0] = 0;
		}
	
		date.setMonth(temp[0]);
	}
	
	if(temp[1].length != 2) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}
	else {
		date.setDate(temp[1]);
	}
	
	if(temp[2].length != 4) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}
	else {
		date.setFullYear(temp[2]);
	}
		
	if(temp[0] != date.getMonth() || temp[1] != date.getDate() || temp[2] != date.getFullYear()) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}

	field.style.backgroundColor = defaultColor;
	return true;

}


function validate4DigitYear(field) {
	var errormsg = 'Please enter a valid 4-digit year in the \'' + field.name + '\' field. (i.e. 1980, 2000, etc...)';
	var allValid = true;
	var year = field.value;

	if(year.length == 0) {
		field.style.backgroundColor = defaultColor;
		return true;
	}

	if(year.length != 4) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}

	var date = new Date();
	date.setFullYear(year);

	if(year != date.getFullYear()) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;

	}

	field.style.backgroundColor = defaultColor;
	return true;
	
}


function validateMonthYearDate(field) {
	var errormsg = 'Please enter a valid date in the \'' + field.name + '\' field. (i.e. 07/2009, 01/2010, etc...)';
	var allValid = true;
	var fullDate = field.value;
	count = 0;

	if(fullDate.length == 0) {
		field.style.backgroundColor = defaultColor;
		return true;
	}

	for(i = 0; i < fullDate.length; i++) {
		ch = fullDate.charAt(i);

		if(dateDelimiterOnly.charAt(0) == ch) {
			count++;
		}
	}

	if(count != 1) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}

	var date = new Date();
	var temp = new Array();

	temp = fullDate.split(dateDelimiterOnly.charAt(0));

	if(temp[0].length != 2 || temp[0] == 00) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}
	else {

		if(temp[0] == 12) {
			temp[0] = 0;
		}

		date.setMonth(temp[0]);
	}

	if(temp[1].length != 4) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}
	else {
		date.setFullYear(temp[1]);
	}

	if(temp[0] != date.getMonth() || temp[1] != date.getFullYear()) {
		field.style.backgroundColor = errorColor;
		alert(errormsg);
		field.focus();
		allValid = false;
		return false;
	}

	field.style.backgroundColor = defaultColor;
	return true;

}