Question

I have multiple jquery files in my project.
Yesterday googled this problem and find solution. I edited this

$(document).ready(function () {

with this

function pageLoad() {

Now problem is that if i will use this in all my jquery files. Every scripts will stops working.

Answer 1

That is two different things. The

$(document).ready(function () {

is from and to jquery, it tells when the DOM is loaded and it start executing the code inside.

The

function pageLoad() {

is from ASP.NET and it is one of handler of Application.Load (client-side)

The reason why it will stop working is because in the same page you can only have one event with the same name, by default pageLoad will be the handler of Application.Load but you can associate another name. I don’t see why you have problems between the two, can you explain it better?

EDIT:
After your comment, if you want/need to use Sys.Application.add_load (by default pageLoad) you should add a different name for each js file you need.

From msdn:

// Attach a handler to the load event.
Sys.Application.add_load(applicationLoadHandler);

function applicationLoadHandler() {
    // Redirect to alternate page if not business hours.
    var d = new Date();
    if (!(8 < d.getHours() < 17)) {
        window.location = "AfterHours.aspx";
    }

As you can see, you can give a different name to add_load and you should give a different name to use more than one for the same page/request.

}