Js modifies the value of a specified parameter in the url

When there are many search conditions on a page and joint get query is required, it is no problem to organize them into a correct url according to certain rules, but how do you organize your url when this joint query can proceed without limit? Is your query parameters appended to the current url unrestricted? Obviously, this is unscientific. The following describes how to directly modify the value of a parameter in the current url without causing multiple values in the same parameter in the url. To some extent, the url length is minimized. It is user-friendly and conducive to the optimization of search engines. The following describes how to use javascript to modify the value of a parameter in a url:

/** Url destination url (http://www.phpernote.com/) * parameter name to be replaced by arg * arg_val value of the parameter * return url parameter replaced by url */function changeURLArg (url, arg, arg_val) {var pattern = arg + '= ([^ &] *)'; var replaceText = arg + '=' + arg_val; if (url. match (pattern) {var tmp = '/(' + arg + '=) ([^ &] *)/G'; tmp = url. replace (eval (tmp), replaceText); return tmp;} else {if (url. match ('[\?] ') {Return url +' & '+ replaceText;} else {return url + '? '+ ReplaceText;} return url +' \ n' + arg + '\ n' + arg_val ;}

The usage is as follows:

changeURLArg('http://www.phpernote.com/article.php?class_id=3&id=2','class_id',4);

The result is: http://www.phpernote.com/article.php? Class_id = 4 & id = 2

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