function ewag(iku)
{
	var myiku = new Array();
	var striki = "";
	for (i=0;i<iku.length;i++)
	{
		myiku[i] = String.fromCharCode(iku.charCodeAt(i)-1);
		striki=striki.concat(myiku[i]);
	}
//	return striki;
	document.write(striki);
}