A tiny jQuery plugin for reading current url parameters.
For instance, for url http://your.site.com?n1=v1&n2=v2a&n2=v2b&n3
$.urlparam(); // => {n1: 'v1', n2: ['v2a', 'v2b'], n3: ''}
$.urlparam('n1'); // => 'v1'
$.urlparam('n2'); // => ['v2a', 'v2b']
$.urlparam('n3'); // => ''
$.urlparam('n4'); // => undefined
For url without query part, it always returns undefined.