JS URL parameters get and set and delete

JS URL parameters get and set and delete

 Gets the value of the URL parameter: name is the parameter name function getquerystring (name) {var reg = new RegExp ("(^|&)" + name + "= ([^&am P;]            *) (&|$) "," I ");            var r = window.location.search.substr (1). Match (REG);            if (r! = null) {return (r[2]);        } return null;            }//Set URL parameter value, ref parameter name, value new parameter values function Changeurlpar (URL, ref, value) {var str = "";            if (Url.indexof ('? ')! =-1) str = URL.SUBSTR (Url.indexof ('? ') + 1);            else return URL + "?" + ref + "=" + value;            var returnurl = "";            var setparam = "";            var arr;            var modify = "0";                if (Str.indexof (' & ')! =-1) {arr = Str.split (' & ');                        For (i in arr) {if (arr[i].split (' = ') [0] = = ref) {SetParam = value;                    Modify = "1";         } else {               SetParam = arr[i].split (' = ') [1];                } ReturnUrl = ReturnUrl + arr[i].split (' = ') [0] + "=" + SetParam + "&";                } ReturnUrl = returnurl.substr (0, returnurl.length-1);  if (modify = = "0") if (ReturnUrl = = str) ReturnUrl = ReturnUrl + "&" + ref +            "=" + value;                    } else {if (str.indexof (' = ')! =-1) {arr = str.split (' = ');                        if (arr[0] = = ref) {SetParam = value;                    Modify = "1";                    } else {setparam = arr[1];                    } ReturnUrl = arr[0] + "=" + SetParam;  if (modify = = "0") if (ReturnUrl = = str) ReturnUrl = ReturnUrl + "&"                + ref + "=" + value; } else                   ReturnUrl = ref + "=" + value;        } return url.substr (0, Url.indexof ('? ')) + "?" + ReturnUrl;            }//Delete parameter value function delquestr (URL, ref) {var str = "";            if (Url.indexof ('? ')! =-1) {str = URL.SUBSTR (Url.indexof ('? ') + 1);            } else {return URL;            } var arr = "";            var returnurl = "";            var setparam = "";                if (Str.indexof (' & ')! =-1) {arr = Str.split (' & '); For (I-in arr) {if (arr[i].split (' = ') [0]! = ref) {ReturnUrl = ReturnUrl + arr[                    I].split (' = ') [0] + "=" + arr[i].split (' = ') [1] + "&"; }} return Url.substr (0, Url.indexof ('? ')) + "?" + returnurl.substr (0, Returnurl.length-1)            ;                } else {arr = str.split (' = ');  if (arr[0] = = ref) {                  Return url.substr (0, Url.indexof ('? '));                } else {return URL; }            }        }

　　

JS URL parameters get and set and delete