SO 40779251

Solves Stackoverflow issue 40779251

by mat2e

HTML

<input type="text" name="subject" id="subject" readonly="true"/>

JavaScript

function getParameterByName(name, url) {
if (!url) {
url = window.location.href;
}
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}

var foo = getParameterByName('foo', 'www.google.de?foo=hugo');

document.getElementsByName('subject')[0].value = foo; // this is I am thinking of to store value in textbox id="subject"