How to call javascript function in asp.net page load event

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  http://www.c-sharpcorner.com/uploadfile/17e8f6/passing-values-from-javascript-functions-to-Asp-Net-functions-in-Asp-Net/
These are the following SQL queries.create database Testuse Testcreate table Emp(EmpName varchar(20) not null,EmpAge int not null,EmpSalary money not null) select * from Emp.Now to begin with the ASP.Net code.The following design needs to be done. Like in the following: Once you click on the save button a message will be ask if you want to add these details? If you click on ok it will check whether your age is greater than or equal to 25 or not

  http://www.c-sharpcorner.com/UploadFile/rohatash/calling-server-side-function-from-javascript-in-Asp-Net/
It cannot interact with the instance properties and methods of your Page class, because a Page method call creates no instance of the Page or any of its controls

  http://forums.asp.net/t/1300979.aspx?Call+client+side+javascript+function+for+TextBox+s+OnTextChanged+event
I want to define a javascript function on the client site and then the event will call the client side function to set another TextBox control's text instead

  http://www.dotnetspider.com/resources/1521-How-to-call-Postback-from-Javascript.aspx
Postback is built into the ASP.NET and most of the web controls support it without writing any code.Calling postback event from JavascriptThere may be some scenario where you may want to explicitly postback to the server using some clientside javascript. We now have a customer who needs this on an ASP server, the folks who host the site will not turn on PHP.We do call tracking, so when a call is hung up our customers have the ability on the back end to set their post back page

  http://www.codedigest.com/Articles/ASPNET/314_Multiple_Ways_to_Call_Javascript_Function_from_CodeBehind_in_ASPNet.aspx
For example, in an input form we would like to get the confirmation from the users before storing it to the database whose validity cannot be determined through validation functions