window.location 下面应该有你想要的

/*
* url 目标url
* param 需要替换的参数名称
* paramVal 替换后的参数的值
* 返回值为新的url
* example: updateURLParameter('www.baidu.com?id=12','id','13') 返回结果为 'www.baidu.com?id=13'
*/

function updateURLParameter(url, param, paramVal){
    var newAdditionalURL = "";
    var tempArray = url.split("?");
    var baseURL = tempArray[0];
    var additionalURL = tempArray[1];
    var temp = "";
    if (additionalURL) {
        tempArray = additionalURL.split("&");
        for (i=0; i<tempArray.length; i++){
            if(tempArray[i].split('=')[0] != param){
                newAdditionalURL += temp + tempArray[i];
                temp = "&";
            }
        }
    }

    var rows_txt = temp + "" + param + "=" + paramVal;
    return baseURL + "?" + newAdditionalURL + rows_txt;
}