//Image Size Validation
// tests the size of an image.
function checkImageSize(myImageTag, width, height)
{
	//myImageTag.src=myImageInput.value;
	if(myImageTag.height != height || myImageTag.width != width)
	{
		alert('The image you have specified has a width and height of ' + myImageTag.width + ' x ' + myImageTag.height + '.  The image need to have a width and height of ' + width + ' x ' + height + '.');
		return false;
	}
	
	return true;
}

//Tests a URL in a form field by poping it up into a new window
function TestURL(textfield)
{
	if (textfield.value!='')
		window.open(textfield.value,'test','');
	else
		alert('Please enter in a website to test.');
}

// Check that a string contains only numbers
function isNumeric(string, ignoreWhiteSpace) {
	if (string.search) {
		if ((ignoreWhiteSpace && string.search(/[^\d\s]/) != -1) || (!ignoreWhiteSpace && string.search(/\D/) != -1)) { return false; }
		
	}
	return true;
}

function removeSpaces(string) {
	var newString = '';
	for (var i = 0; i < string.length; i++) {
		if (string.charAt(i) != ' ') newString += string.charAt(i);
	}
	return newString;
}

function isZipcode(zipcode) {
	zipcode = removeSpaces(zipcode);
	if ((zipcode.length == 5) && isNumeric(zipcode)) { return true; }

   return false;
}

function ValidEmail(myTextField) 
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
{
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myTextField.value))
	{		
		return (true);
	} else {
		return (false);
	}
}

function isEmpty(myTextField)
{
	if (myTextField.value==null)
		return false;

	var re = /\s/g; //Match any white space including space, tab, form-feed, etc. 
	
	var str = myTextField.value.replace(re, "");
	
	if (str.length == 0) 
	{
		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
}

function checkEmail(field, fieldValue, fieldName, isRequired)
{
	if(trim(fieldValue) == "")
	{
		if(isRequired)
		{
			alert("Please enter a valid " + fieldName + ".");
			field.focus();
			return false;
		}
		else
		{
			return true;
		}
	}
	var pattern = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;
	if(!pattern.test(fieldValue))
	{
		alert("The " + fieldName + " field must match the pattern user@servername.");
		field.focus();
		return false;
	}
	return true;
}

function checkPhone(field, fieldValue, fieldName, isRequired)
{
	// check for empty form field
	if(trim(fieldValue) == "")
	{
		if(isRequired)
		{
			alert("Please enter a valid " + fieldName + ".");
			field.focus();
			return false;
		}
		else
		{
			return true;
		}
	}

	//validate phone number format
	var phonePattern = /^\D?(\d{3})\D?\D?(\d{3})\D?(\d{4})$/;
	if( !phonePattern.test(fieldValue) ) {
		alert("The " + fieldName + " field should match one of the following patterns (123) 123-1234, 123-123-1234, 123.123.1234, or 1234231234.");
		field.focus();
		return false;
	}
	return true;
}

function leftTrim(toTrim)
{
	var blank = new String(" \t\n\r");
	var s = new String(toTrim);

	if (blank.indexOf(s.charAt(0)) != -1)
	{
		var j=0, i = s.length;
		while (j < i && blank.indexOf(s.charAt(j)) != -1)
		j++;
		s = s.substring(j, i);
	}
	return s;
}

function rightTrim(toTrim)
{
	var blank = new String(" \t\n\r");
	var s = new String(toTrim);

	if (blank.indexOf(s.charAt(s.length-1)) != -1)
	{
		var i = s.length - 1;
		while (i >= 0 && blank.indexOf(s.charAt(i)) != -1)
		i--;
		s = s.substring(0, i+1);
	}
	return s;
}

function trim(toTrim)
{
	return rightTrim(leftTrim(toTrim));
}