Request.QueryString in JavaScript

Request.QueryString in JavaScript

Request.QueryString in JavaScript

Every now and then I find myself needing this function in JavaScript so I end up writing it over and over again. So I decided to post it on our blog and file it under Tip-And-Tricks so I (and, yeah, you too!) can come back and get it when needed again.

So here we go:

[code lang=”javascript”]

<script type="text/javascript">

function qs(key) {
//Get the full querystring
fullQs =;
//Break it down into an array of name-value pairs
qsParamsArray = fullQs.split("&");
//Loop through each name-value pair and
//return value in there is a match for the given key
for (i=0;i<qsParamsArray.length;i++) {
strKey = qsParamsArray[i].split("=");
if (strKey[0] == key) {
return strKey[1];

//Test the output (Add ProductId to your URL)
var ProductId = QueryString("ProductId");
document.write("Product Id: " + ProductId + " – Full Query String: " + fullQs);




[code language=”javascript”]




Antonio Chagoury

Hi, I'm Antonio, Founder and CEO of Maxiom Technology (formerly Inspector IT).I'm a technology executive and entrepreneur who has achieved consistent success in driving growth, generating revenue, and enhancing value in domestic and international markets through technology product innovations.

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