jquery Function getQueryStrings(), randomString(len), refresh(),precise_round(num,decimals)

function getQueryStrings() {

var assoc = {};

var decode = function (s) {

return decodeURIComponent(s.replace(/\+/g, " "));

};

var queryString = location.search.substring(1);

var keyValues = queryString.split('&');

for (var i in keyValues) {

var key = keyValues[i].split('=');

if (key.length > 1) {

assoc[decode(key[0])] = decode(key[1]);

}

}

return assoc;

}

function randomString(length) {

var result = '';

var chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

for (var i = length; i > 0; --i) result += chars[Math.round(Math.random() * (chars.length - 1))];

return result;

}

function refresh() {

$(".refresh a i").addClass('fa-spin');

window.location.reload();

}

function precise_round(num, decimals) {

var sign = num >= 0 ? 1 : -1;

return (Math.round((num * Math.pow(10, decimals)) + (sign * 0.001)) / Math.pow(10, decimals)).toFixed(decimals);

}