[рони]

jay-S,


https://learn.javascript.ru/regexp-m...egexp-test-str

var my_str = "821.99";
var a = "\\.99"
var reg = new RegExp(a+"$");
alert(reg.test(my_str));
reg.lastIndex = 0;
my_str = "4324.73";
alert(reg.test(my_str));