Open specific tab on page load with JQuery UI

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I made a simple HTML page with JQuery UI tabs. But the customer asked to give URLs for each tab. I was a bit surprised with it, because I remember only how to make default tab on page load. You can do it with the syntax like this:

$("#tabs").tabs( { selected: x  });

 where 'x' is integer index of tab. So, the task was to determine which tab is requested.

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JavaScript function EnableDisableChekboxes to set constraint of maximum allowed quantity checked checkboxes

There's a common constraint in votes or surveys like "choose no more than 3 items". And it's not a good idead to allow user control the checked items quantity. You can easily set constraint to a quantity of checked checkbox items with JavaScript and jQuery. You can just disable unchecked checkbox items if user checked maximum quantity and enables items again in case of unchecking.

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