Introducing WML and WMLScript

The WMLScript Code

/*
 * Return the date when the data was generated.
 *
 *@param varName - the variable to store the results 
 */
extern function getInfoDate(varName) {

	WMLBrowser.setVar(varName,"October 29 1998");
	WMLBrowser.refresh();
}

/*
 * Calculate the exchange rate
 *
 *@param varName - the variable to store the results 
 *@param amount - the amount to convert
 *@param from - the original currency
 *@param to - the currency to convert to
 *@return a string containing the converted amount; or an error
 * 	      if "from" and/or "to" is not supported.
 */
extern function convert(varName,from,to,amount) {

	var multiplier = 0.0;
	var returnString = "Not Available";
	var result;

	if (from == "DEM") {
		/* 
		 * German Mark 
		 */
		var DEM_FIM = 0.328728;
		var DEM_FRF = 0.298331;
		var DEM_USD = 1.653500;

		if (to == "DEM")
			multiplier = 1.0;
		else if (to == "FIM")
			multiplier = DEM_FIM;
		else if (to == "FRF")
			multiplier = DEM_FRF;
		else if (to == "USD")
			multiplier = DEM_USD;
	} else if (from == "FIM") {
		/*
		 * Finnish Markka
		 */
		var FIM_DEM = 3.042032;
		var FIM_FRF = 0.907533;
		var FIM_USD = 5.030000;

		if (to == "FIM")
			multiplier = 1.0;
		else if (to == "DEM")
			multiplier = FIM_DEM;
		else if (to == "FRF")
			multiplier = FIM_FRF;
		else if (to == "USD")
			multiplier = FIM_USD;
	} else if (from == "FRF") {
	/*
	 * French Franc
	 */
		var FRF_DEM = 3.351981;
		var FRF_FIM = 1.101889;
		var FRF_USD = 5.542500;

		if (to == "FRF")
			multiplier = 1.0;
		else if (to == "FIM")
			multiplier = FRF_FIM;
		else if (to == "DEM")
			multiplier = FRF_DEM;
		else if (to == "USD")
			multiplier = FRF_USD;
	} else if (from == "USD") {
		/*
		 * US Dollar
		 */
		var USD_DEM = 0.604778;
		var USD_FIM = 0.198807;
		var USD_FRF = 0.180424;

		if (to == "USD")
			multiplier = 1.0;
		else if (to == "FIM")
			multiplier = USD_FIM;
		else if (to == "FRF")
			multiplier = USD_FRF;
		else if (to == "DEM")
			multiplier = USD_DEM;
	} 

	if (multiplier != 0.0) {
		/*
		 * Make the calcualtion
		 */
		 result = amount / multiplier;
		 returnString = String.toString(result);
		 returnString = String.format("%.2f", returnString);
	}
 	
	/*
	 * Return the results to the browser
	 */
	WMLBrowser.setVar(varName,returnString);
	WMLBrowser.refresh();
}