TODO:
Have you ever wanted to execute some javascript before an async postback? Place the below code in your aspx file, just under the Main Content Placeholder, or body tag if you are not using a master page.
SOLUTION:
<script type="text/javascript">
//add the init activity
Sys.Application.add_init(appl_init);
//Do this on init
function appl_init() {
var pagegReqManager = Sys.WebForms.PageRequestManager.getInstance();
pagegReqManager.add_beginRequest(BeginHandler);
}
//Called before async postback
function BeginHandler() {
MyJavascriptMethod();
MyOtherJavascriptMethod();
}
</script>
NOTES:
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