<!--


monSize = [31,28,31,30,31,30,31,31,30,31,30,31];
vChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_";

function checkEmail(email)
	{
	if(email.indexOf('@')<0) return false;
	if(email.indexOf('.')<0) return false;
	if(email.length<6) return false;
	if(email.indexOf('.@')>=0) return false;
	if(email.indexOf('@.')>=0) return false;
	if(email.indexOf('@')==0) return false;
	if(email.indexOf('.')==0) return false;
	if(email.indexOf('_')==0) return false;
	if(email.indexOf('@')==email.length-1) return false;
	if(email.indexOf('.')==email.length-1) return false;
	if(email.indexOf('_')==email.length-1) return false;
	rem = "";
	for(i=0;i<email.length;i++)
		{
		if(email.charAt(i) != '@' && email.charAt(i) != '.')
			rem += email.charAt(i);
		}
	return checkID(rem);
	}

function checkID(tempID)
	{
	for(i=0;i<tempID.length;i++)
		{
		found = false;
		e = vChars.length;
		if(i==0)
			e -= 11;
		for(j=0;j<e;j++)
			{
			if(tempID.charAt(i) == vChars.charAt(j))
				found = true;
			}
		if(!found)
			return false;
		}
	return true;
	}

function checkPwd(tempPwd)
	{
	for(i=0;i<tempID.length;i++)
		{
		found = false;
		for(j=0;j<vChars.length-1;j++)
			{
			if(tempID.charAt(i) == vChars.charAt(j))
				found = true;
			}
		if(!found)
			return false;
		}
	return true;
	}

function isWholeNumber(number)
	{
	if(isNaN(number)) return false;
	if(number.indexOf('.') >= 0) return false;
	if(number.indexOf('e') >= 0) return false;
	if(number.indexOf('E') >= 0) return false;
	return true;
	}

function isDecimalNumber(number)
	{
	if(isNaN(number)) return false;
	if(number.indexOf('.') < 0) return false;
	return true;
	}

function checkDate(dateValue)
	{
	//return False if Invalid , else True
	//format used : mm/dd/yyyy
	if (dateValue.length < 8 || dateValue.length > 10) return false;
	
	slash1Pos = dateValue.indexOf("/");
	if (slash1Pos < 0) return false;
	slash2Pos = dateValue.indexOf("/",slash1Pos+1);
	if (slash2Pos < 0) return false;
	
	mon = dateValue.substring(0,slash1Pos);
	day = dateValue.substring(slash1Pos+1,slash2Pos);
	year = dateValue.substring(slash2Pos+1,dateValue.length);
	
	if(day.length<1 || day.length>2) return false;
	if(mon.length<1 || mon.length>2) return false;
	if(year.length<1 || year.length>4) return false;
	
	if(!isWholeNumber(day)) return false;
	if(!isWholeNumber(mon)) return false;
	if(!isWholeNumber(year)) return false;

	now = new Date();
	if(mon<1 || mon>12) return false;
	if(day<1 || day>monSize[mon-1]) return false;
	if(year<1900 || year>now.getFullYear()) return false;
	
	return true
	}

var ie4 = false;
if(document.all)
	ie4 = true; 

function setContent(name, value) 
	{
	var d;  
	if (ie4)
		d = document.all[name];
	else
		d = document.getElementById(name);
	d.innerHTML = value;    
	}

function getContent(name)
	{
	var d;
	if (ie4)
		d = document.all[name];
	else
		d = document.getElementById(name);
	return d.innerHTML;
	}

function setColor(name, value)
	{
	var d;  
	if (ie4)
		d = document.all[name];
	else
		d = document.getElementById(name);
	d.style.color = value;  
	}

function getColor(name)
	{
	var d;
	if (ie4)
		d = document.all[name];
	else
		d = document.getElementById(name);
	return d.style.color;
	}

function animate(name, col)
	{
	var value = getContent(name);
	if (value.indexOf('<span') >= 0)
		return;
	var length = 0;
	var str = '';
	var ch;
	var token = '';
	var htmltag = false;	
	for (i = 0; i < value.length; i++)
		{
		ch = value.substring(i, i+1);
		if (i < value.length - 1) 
			nextch = value.substring(i+1, i+2);
		else
			nextch = ' ';
		token += ch;
		if (ch == '<' && '/aAbBpPhHiIoOuUlLtT'.indexOf(nextch) >= 0)
			htmltag = true;
		if (ch == '>' && htmltag)
			htmltag = false;
		if (!htmltag && ch.charCodeAt(0) > 30 && ch != ' ' && ch != '\n') 
			{		
			str += '<span id="' + name + '_' + length + '">' + token + '</span>';
			token = '';
			length++;
			}
		}
	setContent(name, str);
	command = 'animateloop(\'' + name + '\', ' + length + ', 0, 1, \'' + col + '\')';
	setTimeout(command , 100);
	}

function animateloop(name, length, ind, delta, col)
	{
	var next = ind + delta;
	if (next >= length)
		delta = delta * -1; next = ind + delta;
	if (next < 0)
		{
		delta = delta * -1; 
		next = ind + delta;
		}
	setColor(name + '_' + ind, getColor(name + '_' + next));
	setColor(name + '_' + next, col);
	command = 'animateloop(\'' + name + '\', ' + length + ', ' + next + ', ' + delta + ', \'' + col + '\')';
	setTimeout(command , 100);
	}

window.status = "Mehdi Ali's JavaServer Pages Guest Book Application for JavaServerfaces.co.uk";

function MM_swapImgRestore() { //v3.0
  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_preloadImages() { //v3.0
  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_findObj(n, d) { //v4.01
  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 && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  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];}
}
//-->
