Parameters – Marius van Witzenburg

How to get parameters from query string with JavaScript

By mariusvw

June 12, 2011

I don’t remember where I found this piece of code, but it works nice to get query string parameters 🙂

function getURLParam(strParamName) {
	var strReturn = '';
	var strHref = window.location.href;
	if (strHref.indexOf("?") &gt; -1){
		var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
		var aQueryString = strQueryString.split("&amp;");
		for (var iParam = 0; iParam &lt; aQueryString.length; iParam++) { if (aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") &gt; -1) {
				var aParam = aQueryString[iParam].split("=");
				strReturn = aParam[1];
				break;
			}
		}
	}
	return unescape(strReturn);
}

function getURLParam(strParamName) {

var strReturn = '';

var strHref = window.location.href;

if (strHref.indexOf("?") > -1){

var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();

var aQueryString = strQueryString.split("&");

for (var iParam = 0; iParam < aQueryString.length; iParam++) { if (aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1) {

var aParam = aQueryString[iParam].split("=");

strReturn = aParam[1];

break;

}

return unescape(strReturn);

}

it works quite simple, first it grabs all data after the question mark in the url, then it splits this result on the & character and then it splits again on the equal character. […]