// creates a trim prototype on the String object
// returns string with leading and trailing spaces removed
// call as strString.trim();
String.prototype.trim = function() {
return this.replace(/^\s*/,"").replace(/\s*$/,"")
}

// global variable for popup windows
var popWin;

// popup windows
function popupWin(strURL,strName,strType,strWidth,strHeight) {
	var strOptions="";
	if (strType=="console") strOptions="toolbar=no,scrollbars=no,status=no,width="+strWidth+",height="+strHeight;
	if (strType=="fixed") strOptions="status,width="+strWidth+",height="+strHeight;
	if (strType=="resizable") strOptions="status,scrollbars,resizable,width="+strWidth+",height="+strHeight;
	popWin = window.open(strURL,strName,strOptions);
	if (window.focus) popWin.focus();	
}

// begin newsletter form submission to new window
function doNewsletterSignup(strWin,strWidth,strHeight) {
	if (popWin != null){if(!popWin.closed) popWin.close();}
	popWin = window.open("",strWin,"width="+strWidth+",height="+strHeight+",resizable=yes,status=yes,scrollbars=yes");
	if (popWin.opener == null) popWin.opener = window;
	popWin.focus();
}
// end newsletter form submission to new window


// validate a form with name and email boxes
function ValidateNameEmail(theform) {
	if (isLegal(theform.name.value.trim(),true) == false) {
	alert("Please use only letters and numbers for your Name.");
	theform.name.focus();
	return false;
	}
	if (isValidEmail(theform.email.value.trim()) == false) {
	alert("Please provide a valid Email address.");
	theform.email.focus();
	return false;
	}
return true;
}

// print the page
function printPage() {
	if (window.print) window.print();
	else alert("To print this page please click on the File menu and select Print.");
}

// internal functions called by exposed functions
function isValidEmail(strEmail)
{
	if(strEmail == null || strEmail == "") return false;
	if (strEmail.search(/^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/) != -1)
		return true;
	else
		return false;
}
function isLegal(strText, blRequired)
{
	if (blRequired == true)
	{
		if(strText == null || strText == "") return false;
	}
	var invalids = "\!\[\]\{\}\+#$\%\^\*()~,\'<>/?;:\|"
	for(i=0; i<invalids.length; i++)
	{
		if(strText.indexOf(invalids.charAt(i)) >= 0 )
		{
			return false;
		}
	}
return true;
}
function isValidURL(strURL)
{
	if(strURL == null || strURL == "") return false;
	if (strURL.search(/^(http:\/\/){1}([\w]+)(.[\w]+){1,2}$/) != -1)
		return true;
	else
		return false;
}