how to pass javascript return variable to code behind

Question

hi folks
i am write one javascript function
as below

i want to pass the a value to the my code behind .how i pass it

function myKeyPress(e) {

var keynum;

if (window.event) { // IE

keynum = e.keyCode;

} else

if (e.keyCode==13) { // Netscape/Firefox/Opera

keynum = e.which;

alert(String.fromCharCode(keynum));

}

else if (e.keyCode == 65) {

return false;

}

var a = String.fromCharCode(keynum);

}

</script>

Abhijit Patil · Answer

Thank you all for quick reply

Gowtham Rajamanickam · Answer

var somefunction = function () { var hdnfldVariable = document.getElementById('hdnfldVariable'); hdnfldVariable.value = 'value from javascript'; }

Manoj Bhoir · Answer

You cannot interact between client side and server side without sending and HTTP request to the server. You can do it using Ajax: http://en.wikipedia.org/wiki/Ajax_%28programming%29 One convenient way of using Ajax is using jQuery .Ajax(): http://api.jquery.com/jquery.ajax/ Or you can do so using Hidden Field. Create a hidden field variable in the client side as In the javascript you can assign some value to the hidden variable as var somefunction = function () { var hdnfldVariable = document.getElementById('hdnfldVariable'); hdnfldVariable.value = 'value from javascript'; } and you can read the hidden field variable in the code behind as string variable = hdnfldVariable.Value; I hope this will help you.

ramya bharath · Answer

You can put te value in a hidden field and access it in the server irvoass yhe value threw ajax