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sgreenfield/gist:2802070

Created May 27, 2012 03:35
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JavaScript updateQueryStringParameter
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gistfile1.js
function updateQueryStringParameter(a, k, v) {
var re = new RegExp("([?|&])" + k + "=.*?(&|$)", "i"),
separator = a.indexOf('?') !== -1 ? "&" : "?";
if (a.match(re)) return a.replace(re, '$1' + k + "=" + v + '$2');
else return a + separator + k + "=" + v;
}
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