Functions for get values from URL's get parameter && edit URL strings

parameters_from.js

function getURLParameter(name) { 
	return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search)||[,""])[1].replace(/\+/g, '%20'))||null; 
}

function changeUrlParameter(url, parametro, value){
	let separator = '&'
	if(url.indexOf("?") === -1)
		separator = '?'

	url = window.location.href + '&'
	let regx = new RegExp('(' + parametro + '=).*?(&)');

	if(!regx.test(url)){
		url = url.slice(0, -1)
		return `${url}${separator}${parametro}=${value}`
	} else {
		let newText = url.replace(regx,'$1' + value + '$2');
		return newText.slice(0, -1)
	}	 
}