Allow only 2 decimal points entry to a textbox using javascript or jquery?

Question

I called a class called test for my textbox. When I entered the first value for e.g. the first value as 4., then suddenly the output coming as 4.00

Answer 1

$(document).on("keyup", ".ctc", function () 
 {

    if (!this.value.match(/^\s*\d*\.?\d{0,2}\s*$/) && this.value != "") {
        this.value = "";
        this.focus();
        alert("Please Enter only alphabets in text");
    }
});