How to make counter not reset on page refresh javascript
<form name="counter">
<input type="text" size="8" name="chandresh" id="counter">
</form>
<script type="text/javascript">
function getCookie(cname) {
var name = cname + "=";
var decodedCookie = decodeURIComponent(document.cookie);
var ca = decodedCookie.split(';');
for(var i = 0; i <ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
var cnt = 60;
function counter(){
if(getCookie("cnt") > 0){
cnt = getCookie("cnt");
}
cnt -= 1;
document.cookie = "cnt="+ cnt;
jQuery("#counter").val(getCookie("cnt"));
if(cnt>0){
setTimeout(counter,1000);
}
}
counter();
</script>