// email kireol at yahoo.com
// autoMask - an adaption of anyMask
// <input type=text name=ssn onkeypress="return autoMask(this,event, '###-##-####');">
// this will force #'s, not allowing alphas where the #'s are, and auto add -'s
function autoMask(field, event, sMask) {
	//var sMask = "**?##?####";

	var KeyTyped = String.fromCharCode(getKeyCode(event));
	var targ = getTarget(event);
	keyCount = targ.value.length;
	
	if(event.target && getKeyCode(event) == 8) return true;
	if(keyCount == sMask.length)
	{
		return false;
	}
	if ((sMask.charAt(keyCount+1) != '#') && (sMask.charAt(keyCount+1) != 'A' ) )
	{
		 field.value = field.value + KeyTyped + sMask.charAt(keyCount+1);
		 return false;
	}

	if (sMask.charAt(keyCount) == '*')
		return true;

	if (sMask.charAt(keyCount) == KeyTyped)
		return true;

	if ((sMask.charAt(keyCount) == '#') && isNumeric(KeyTyped))
		return true;

	if ((sMask.charAt(keyCount) == 'A') && isAlpha(KeyTyped))
		return true;

	if ((sMask.charAt(keyCount+1) == '?') )
	{
		field.value = field.value + KeyTyped + sMask.charAt(keyCount+1);
		return true;
	}
	if (KeyTyped.charCodeAt(0) < 32) return true;
	
	return false;
}

function getTarget(e) {
	// IE5
	if (e.srcElement) 
		return e.srcElement;
	if (e.target) 
		return e.target;
}

function getKeyCode(e) {
	//IE5
	if (e.srcElement) 
		return e.keyCode
	// NC5
	if (e.target) 
		return e.which
}

function isNumeric(c)
{
	var sNumbers = "01234567890";
	if (sNumbers.indexOf(c) == -1)
		return false;
	else 
		return true;
}

function isAlpha(c)
{
	var lCode = c.charCodeAt(0);
	if (lCode >= 65 && lCode <= 122 )
		return true;
	else
		return false;
}

function isPunct(c)
{
	var lCode = c.charCodeAt(0);
	if (lCode >= 32 && lCode <= 47 )
		return true;
	else
		return false;
}