function MM_preloadImages() { 
	var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_swapImgRestore() { 
	var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_findObj(n, d) { 
	var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
	d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	if(!x && document.getElementById) x=document.getElementById(n); return x;
}
function MM_swapImage() {
	var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function swapNavState(navObj, statusMessage) {
	var startPos = navObj.className.length - 3;
	var endPos = navObj.className.length;
	var navClassName = navObj.className.toString();
	var navClass = navClassName.substring(0, startPos);
	var navState = navClassName.substring(startPos, endPos);
if (navState == 'Off') { navObj.className = navClass + 'Ovr'; } 
else { navObj.className = navClass + 'Off'; }
	window.status = statusMessage;
}

function swapNavState2(navObj, statusMessage) {
	var startPos = navObj.className.length - 3;
	var endPos = navObj.className.length;
	var navClassName = navObj.className.toString();
	var navClass = navClassName.substring(0, startPos);
	var navState = navClassName.substring(startPos, endPos);
if (navState == 'Cff') { navObj.className = navClass + 'Cvr'; } 
else { navObj.className = navClass + 'Cff'; }
	window.status = statusMessage;
}

function navGoTo(sendTo) {
	parent.document.location = sendTo;
}


<!--- ************* --->
<!--- FORM CHECKING --->
<!--- ************* --->


	
<!--- Check that the user really wishes to delete document --->
function checkDelete(){
	if ( confirm('Are you sure you wish to delete this item?')) {
		return true;
	}
	else	{
		return false;
	}
}


<!--- Check if they want to delete just this message --->
function checkDeletePosting(){
	if ( confirm('Deleting this posting will result in the replies to this message being moved up one level.\nAre you sure you wish to delete this posting?')) {
		return true;
	}
	else	{
		return false;
	}
}


<!--- Check if they want to delete the whole discussion thread --->
function checkDeleteAll(){
	if ( confirm('Deleting this posting will result in all of the replies to this message being deleted.\nAre you sure you wish to delete this posting?')) {
		return true;
	}
	else	{
		return false;
	}
}

//isEmpty
function isEmpty (strValue) {
	return (! strValue.replace (/^(\s*)/, "", strValue));
}


<!--- Change the action of the form --->
function changeFormAction(formObj, formActionStr) {
	formObj.action = formActionStr;
	formObj.submit();
}


// isValidEmail
function isValidEmail (emailStr) {

	var emailPat=/^(.+)@(.+)$/; 
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]"; 
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+'; 
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		return false;
	}
	
	var user=matchArray[1];
	var domain=matchArray[2];
	
	if (user.match(userPat)==null) {
		return false;
	}
	
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				return false;
			}
		}
		return true;
	}
	
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		return false;
	}

	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
		domArr[domArr.length-1].length>3) {
		return false;
	}

	if (len<2) {
		return false;
	}

	return true;
}

<!--- Check if something is selected in the select box --->
function isSelected (strValue) {
	if (strValue == "0" || strValue == "")
		return false;
	else
		return true;
}


//isEqualPassword
function isEqualPassword (passValue1, passValue2) {
	return (passValue1 != passValue2);
}

//isNumeric
function isNumeric(sText)
{
	var ValidChars = "0123456789";
	var IsNumber=true;
	var Char;

	for (i = 0; i < sText.length && IsNumber == true; i++) 
	{ 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) 
		{
			IsNumber = false;
		}
	}
	return IsNumber;
}

	
// isValidDate
function isValidDate (strValue) {
	var datePat = /^(\d{2})(\/|-)(\d{2})\2(\d{4})$/;
	var matchArray = strValue.match(datePat); 
	if (matchArray == null) { return false;	}
	day = matchArray[1]; month = matchArray[3]; year = matchArray[4];
	if (month < 1 || month > 12) { return false; }
	if (day < 1 || day > 31) { return false; }
	if ((month==4 || month==6 || month==9 || month==11) && day==31) { return false; }
	if (month==2) {
		var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
		if (day>29 || (day==29 && !isleap)) { return false; }
	}
	return true;
}

// popupWindow
function popupWindow(popupLocation, windowName, popupWidth, popupHeight, statusBarOn) {
	var heightspeed = 15; 	// vertical speed
	var widthspeed 	= 15;  	// horizontal speed
	var leftdist 	= (screen.width - popupWidth) / 2;    	// distance to left edge of window
	var topdist 	= (screen.height - popupHeight) / 2;   	// distance to top edge of window
	if (document.all) {
		if (statusBarOn) {
			var popUpWin = window.open("", windowName, "left=" + leftdist + ",top=" + topdist + ",width=4,height=4,scrollbars=yes,resizable=yes,status=yes,menubar=yes");
		} else { 
			var popUpWin = window.open("", windowName, "left=" + leftdist + ",top=" + topdist + ",width=4,height=4,scrollbars=yes,resizable=no,status=no,menubar=no");
		}
		for (sizeheight = 1; sizeheight < popupHeight; sizeheight += heightspeed) {
			popUpWin.resizeTo("1", sizeheight);
		}
		for (sizewidth = 1; sizewidth < popupWidth; sizewidth += widthspeed) {
			popUpWin.resizeTo(sizewidth, sizeheight);
		}	
		popUpWin.resizeTo(popupWidth, popupHeight);
		popUpWin.location = popupLocation;
	} else {
		var popUpWin = window.open(popupLocation, windowName, "left=" + leftdist + ",top=" + topdist + ",width=" + popupWidth + ",height=" + popupHeight + ",scrollbars=no");
	}
}