Plug-in Adobe : getQueryParam

/******************************************* BEGIN CODE TO DEPLOY *******************************************/
/* Adobe Consulting Plugin: getQueryParam v4.0.1  */
function getQueryParam(a,d,f){function n(g,c){c=c.split("?").join("&");c=c.split("#").join("&");var e=c.indexOf("&");if(g&&(-1<e||c.indexOf("=")>e)){e=c.substring(e+1);e=e.split("&");for(var h=0,p=e.length;h<p;h++){var l=e[h].split("="),q=l[1];if(l[0].toLowerCase()===g.toLowerCase())return decodeURIComponent(q||!0)}}return""}if("-v"===a)return{plugin:"getQueryParam",version:"4.0.1"};var b=function(){if("undefined"!==typeof window.s_c_il)for(var g=0,c;g<window.s_c_il.length;g++)if(c=window.s_c_il[g],c._c&&"s_c"===c._c)return c}();"undefined"!==typeof b&&(b.contextData.getQueryParam="4.0");if(a){d=d||"";f=(f||"undefined"!==typeof b&&b.pageURL||location.href)+"";(4<d.length||-1<d.indexOf("="))&&f&&4>f.length&&(b=d,d=f,f=b);b="";for(var m=a.split(","),r=m.length,k=0;k<r;k++)a=n(m[k],f),"string"===typeof a?(a=-1<a.indexOf("#")?a.substring(0,a.indexOf("#")):a,b+=b?d+a:a):b=""===b?a:b+(d+a);return b}};
/******************************************** END CODE TO DEPLOY ********************************************/

// Given the URL https://example.com/?cid=trackingcode
// Sets the campaign variable to "trackingcode"
s.campaign = getQueryParam('cid');

// Given the URL https://example.com/?cid=trackingcode&ecid=123
// Sets the campaign variable to "trackingcode:123"
s.campaign = getQueryParam('cid,ecid',':');

// Given the URL https://example.com/?cid=trackingcode&ecid=123
// Sets the campaign variable to "trackingcode123"
s.campaign = getQueryParam('cid,ecid');

// Given the URL https://example.com/?cid=trackingcode&ecid=123#location
// Sets the campaign variable to "123"
s.campaign = getQueryParam('ecid');

// Given the URL https://example.com/#location&cid=trackingcode&ecid=123
// Sets the campaign variable to "123"
// The plug-in replaces the URL's hash character with a question mark if a question mark doesn't exist.
s.campaign = getQueryParam('ecid');

// Given the URL https://example.com
// Does not set the campaign variable to a value.
s.pageURL = "https://example.com/?cid=trackingcode";
s.campaign = getQueryParam('cid');

// Given the URL https://example.com
// Sets the campaign variable to "trackingcode"
s.pageURL = "https://example.com/?cid=trackingcode";
s.campaign = getQueryParam('cid','',s.pageURL);

// Given the URL https://example.com
// Sets eVar2 to "123|trackingcode|true|300"
s.eVar1 = "https://example.com/?cid=trackingcode&ecid=123#location&pos=300";
s.eVar2 = getQueryParam('ecid,cid,location,pos','|',s.eVar1);