/*************************************************************************\
boolean isIn(String argvalue, String charlist)
return true if any char from charlist is found in argvalue,
else return false.
\*************************************************************************/

function isIn(argvalue, charlist) {
	argvalue = argvalue.toString();
	charlist = charlist.toString();
	
	if (argvalue.length == 0 || charlist.length == 0 )
	return false;
	
	for (var i = 0; i < charlist.length; i++) {
		var oneChar = charlist.charAt(i);
			
		for (var n = 0; n < argvalue.length; n++) {
			var otherChar = argvalue.charAt(n);
			
			if (oneChar == otherChar )
			return true;
		}
	}
	return false;
}