JS operation Cookie writing and reading example code_javascript skills

Write cookie instance!

Copy code The code is as follows:

var u = "value=123";
document.cookie = u;

Read the cookie instance and read the value of value!

Copy code The code is as follows:

var c_name="value"; // variable name
if (document.cookie.length > 0) {
c_start = document.cookie.indexOf(c_name "=")
if (c_start != -1) {
c_start = c_start c_name. length 1
c_end = document.cookie.indexOf(";", c_start)
if (c_end == -1) c_end = document.cookie.length
// document.write(document.cookie. substring(c_start,c_end) "
");
var sss= unescape(document.cookie.substring(c_start, c_end)) // Get the value
alert(sss)
}
}