url參數中特殊字符?

小弟在看一篇文章發現以下程式碼，但不是很懂其含義和用途

rprotocol = /^\/\//,
rquery = /\?/,
rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
rselectTextarea = /^(?:select|textarea)/i,
rspacesAjax = /\s+/,
rts = /([?&])_=[^&]*/,
rurl = /^([\w\+\.\-]+:)(?:\/\/([^\/?#:]*)(?::(\d+))?)?/；

懇請各位大大幫忙解惑