How to execute javascript function then Code Behind in an ASP Button

Hi Guys,
I am currently working in a web application. I have a problem with calling a js function and codebehind.
I have this asp button that when clicked, a javascript function should be called.
My javascript function is like this:
function Calculate(){
// Set Route in google map
// Store distance, lat/long in an array
Then, after the Calculate function was executed, it should execute the code behind:
protected void btn_calculate_onclick(object sender, EventArgs e)
// Pull data stored in the array created by javascript
// connect to db
// store data
But the javascript function doesn't execute.
What should i do?
Thanks in advance

Hello,
javascript function can not executed in server side, you can tranlate javascription fuction to c# function.
if the reply help you mark it as your answer.
Free
Managed .NET
Word Component(Create,
Modify, Convert & Print)

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