Javascript Alert Problem

I am trying to add an alert box so that the user can choose either Yes or No or Ok and Cancel, but it is not working correctly.I have to do a database check which is done in c shar

Solution 1:

your code is absolutely correct. only syntax error. just remove "\" before starting the double quotes in the line-> Response.Write("return confirm(\"Are you sure?\")");
replace with this line
Response.Write("return confirm("Are you sure?\")");

Solution 2:

I don't see where you're calling the function. Why not have the function always on the page and dynamically add the function call to the button in the code behind?

Something like:

button.Attributes.Add("onclick", "onsub();");