Function validURL

script.js:1–9

(str)

	function validURL(str) {
     var pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
       '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|'+ // domain name
       '((\\d{1,3}\\.){3}\\d{1,3}))'+ // OR ip (v4) address
       '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*'+ // port and path
       '(\\?[;&a-z\\d%_.~+=-]*)?'+ // query string
       '(\\#[-a-z\\d_]*)?$','i'); // fragment locator
      return !!pattern.test(str);
     }
  	  function buttonOpen(buttonValue)
        {