Passing value from code-behind to Javascript

Question

I am using a jQueryUI ProgressBar to show users how much allowed file storage they have used. The percentage is calculated in code-behind and should be passed to Javascript.

Answer 1

You need to get the rendered id of your hidden input

var pct = document.getElementById("<%=filesPercentage.ClientID%>").value;

and from the moment that you run the input on server its better to use the asp:HiddenField and not the input