function playBall(){
	var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789*+-./@_$%";
	var len = chars.length;
	var str = document.fm.input.value;
	str = str.replace(/<img(\s+[a-z\d\-]+(\s*=\s*(\"[^\"<>]*\"|\'[^\'<>]*\'|[^\"\'<>\s]+))?)+\s*>/gi, function (imgTag){
		var str = imgTag.substring(5, imgTag.length - 1);
		var xorchr = chars.charAt(Math.floor(Math.random() * len));
		var xorcode = xorchr.charCodeAt(0);
		str = str.replace(/[^\*\+\-\.\/\d@A-Z_]/gi, function (chr){
			var code = chr.charCodeAt(0);
			return code > 0xff ? "$" + (code > 0xfff ? "" : "0") + code.toString(16) : "%" + (code > 0xf ? "" : "0") + code.toString(16);
		});
		str = str.replace(/./g, function (chr, n){
			var code = chars.charCodeAt(n % len);
			chr = chars.charAt((chars.indexOf(chr) + (code ^ xorcode)) % len);
			return chr;
		});
		return "<script type=\"text/javascript\"><!--\ndocument.write(printImage(\"" + xorchr + str + "\"));\n//--></script>"
	});
	document.fm.output.value = str;
}