var emptyChars = "\r\t\n";
var doublequotes = '"';
var singleQuotes = '\''

function isEmpty(s){
	return ((s == null) || (s.length == 0));
}

function isWhitespace (s){
	var i;
	var whitespace = " \r\t\n";

	if (isEmpty(s)) return true;

	for (i = 0; i < s.length; i++){   
		var c = s.charAt(i);
		if (whitespace.indexOf(c) == -1) return false;
	}

	return true;
}

/****************************************************************/
// checkRequired(fieldValue, fieldName)
function checkRequired(fieldValue, fieldName)
{
	var iCount;
	if(fieldValue ==""){alert("A value is required for " + fieldName);return false;}
	if(fieldValue == null){alert("A value is required for " + fieldName);return false;}
	if(fieldValue.length == 0){alert("A value is required for " + fieldName);return false;}
	
	for (iCount = 0; iCount < fieldValue.length; iCount++)
	{
		var character = fieldValue.charAt(iCount);
		if (emptyChars.indexOf(character) > -1){alert("An illegal character:'" + character + "' was found in " + fieldName);return false;}
	}
	
	for (iCount = 0; iCount < fieldValue.length; iCount++)
	{
		var character = fieldValue.charAt(iCount);
		if (doublequotes.indexOf(character) > -1){alert("Double quotes are not allowed in " + fieldName);return false;}
	}	
	
    return true;
}

/****************************************************************/
// checkBlank(fieldValue, fieldName)
function checkBlank(fieldValue, fieldName)
{
	var iCount;
	if(fieldValue ==""){return false;}
	if(fieldValue == null){return false;}
	if(fieldValue.length == 0){return false;}
	
	for (iCount = 0; iCount < fieldValue.length; iCount++)
	{
		var character = fieldValue.charAt(iCount);
		if (doublequotes.indexOf(character) > -1){alert("Double quotes are not allowed in " + fieldName);return false;}
	}
			
    return true;
}

/****************************************************************/
// checkRequiredLink(fieldValue, fieldName)
function checkRequiredLink(fieldValue, fieldName)
{
	var iCount;
	if(fieldValue ==""){alert("A value is required for " + fieldName);return false;}
	if(fieldValue == null){alert("A value is required for " + fieldName);return false;}
	if(fieldValue.length == 0){alert("A value is required for " + fieldName);return false;}
	if(fieldValue.length <= 7){alert("A complete URL is required for " + fieldName);return false;}
	
	for (iCount = 0; iCount < fieldValue.length; iCount++)
	{
		var character = fieldValue.charAt(iCount);
		if (emptyChars.indexOf(character) > -1){alert("An illegal character:'" + character + "' was found in " + fieldName);return false;}
	}
	
	for (iCount = 0; iCount < fieldValue.length; iCount++)
	{
		var character = fieldValue.charAt(iCount);
		if (doublequotes.indexOf(character) > -1){alert("Double quotes are not allowed in " + fieldName);return false;}
	}	
	
		for (iCount = 0; iCount < fieldValue.length; iCount++)
	{
		var character = fieldValue.charAt(iCount);
		if (singleQuotes.indexOf(character) > -1){alert("Apostrophes are not allowed in " + fieldName);return false;}
	}
    return true;
}

function checkNumber(objField, FieldName){
	var strField = new String(objField);
	
	if (isWhitespace(strField)) return true;
	for (var i=0; i<strField.length; i++)
		if (strField.charAt(i)<'0' || strField.charAt(i)>'9'){
			alert(FieldName + " must be a valid numeric entry.  Please do not use commas or dollar signs or any non-numeric symbols.");
			return false;
		}
	return true;
}

/****************************************************************/
//showWindow(URL, Width, Height)
function showWindow(URL, Width, Height)
{

	var Win = window.open(URL,"",'width=' + Width + ',height=' + Height + ',resizable=yes,scrollbars=yes,menubar=no,status=no' );

}

/****************************************************************/
//isEmail(fieldValue,fieldName)
function isEmail(fieldValue,fieldName)
{
	//'@' is in the string, but not in the first position
	//there is only one '@' symbol
	//there is a '.' in the 3rd or 4th position from the right
	//there is not a '@' followed by a '.'

	if(fieldValue.indexOf("@")<=0){return false;}
	if(fieldValue.indexOf("@") - fieldValue.lastIndexOf("@")!= 0){return false;}
	if(((fieldValue.length - fieldValue.lastIndexOf("."))!=4)&&((fieldValue.length - fieldValue.lastIndexOf(".")!=3))){return false;}
	if(fieldValue.indexOf(".",fieldValue.indexOf("@")) - fieldValue.indexOf("@") == 1){return false;}
	return true;
}



function toggleDisplay(element){
	if (element.style.display == 'none')
		{
		element.style.display = 'block';
		}
	else
		{
		element.style.display = 'none';
		}
}

/***************************************************/
//sortUp moves an item in a MULTI Select to move up in the list
//oReturnControl is usually a hidden list of return values in the new order
function sortUp(oSelectControl,oReturnControl){
	var sTempText,sTempValue,sOrderList,sComma;
						
	if (oSelectControl != null){
		for(i=1;i<oSelectControl.length; i++)
		{
			//if the option is selected
			if (oSelectControl.options[i].selected == true)
			{
									
				sTempText = oSelectControl[i].text;
				sTempValue = oSelectControl[i].value;
				oSelectControl[i].text = oSelectControl[i-1].text;
				oSelectControl[i].value = oSelectControl[i-1].value;
				oSelectControl[i-1].text = sTempText;
				oSelectControl[i-1].value = sTempValue;
				oSelectControl.options[i-1].selected = true;
				oSelectControl.options[i].selected = false;
			}	
		}
		if(oReturnControl != null){
			sOrderList = oSelectControl[0].value;
			sComma = ",";
			for(i=1;i<oSelectControl.length; i++){
				sOrderList = sOrderList + sComma + oSelectControl[i].value;
			}
			oReturnControl.value = sOrderList;
		}
	}else{
	alert("no object was passed to sortUp");
	}
}

/***************************************************/
//sortDown moves an item in a MULTI Select to move down in the list
//oReturnControl is usually a hidden list of return values in the new order
function sortDown(oSelectControl,oReturnControl){
	var sTempText,sTempValue,sOrderList,sComma;
						
	if (oSelectControl != null){
		for(i=0;i<oSelectControl.length-1; i++)
		{
			//if the option is selected
			if (oSelectControl.options[i].selected == true)
			{
				sTempText = oSelectControl[i].text;
				sTempValue = oSelectControl[i].value;
				oSelectControl[i].text = oSelectControl[i+1].text;
				oSelectControl[i].value = oSelectControl[i+1].value;
				oSelectControl[i+1].text = sTempText;
				oSelectControl[i+1].value = sTempValue;
				oSelectControl.options[i+1].selected = true;
				oSelectControl.options[i].selected = false;
				i++;					
			}	
		}
		if(oReturnControl != null){
			sOrderList = oSelectControl[0].value;
			sComma = ",";
			for(i=1;i<oSelectControl.length; i++){
				sOrderList = sOrderList + sComma + oSelectControl[i].value;
				sComma = ",";
			}
			oReturnControl.value = sOrderList;
		}
	}else{
	alert("no object was passed to sortUp");
	}
}


function isValidPhone(sPhone)
{
	var phoneNumberChars = '()- ';
	var sCleanedPhone = '';

	var i;
	for (i = 0; i < sPhone.length; i++)
	{
		var c = sPhone.charAt(i);
		if (phoneNumberChars.indexOf(c) == -1)
			sCleanedPhone += c;
	}

	for (i = 0; i < sCleanedPhone.length; i++)
		{
		var c = sCleanedPhone.charAt(i);
		if (((c < '0') || (c > '9')))
			return false;
		}

	if (sCleanedPhone.length < 10)
		return false;

	return true;
}