獲取URL

//獲取URL
function getParams(param,val) {
    var params = window.location.search;
    var paramStr = "?";
    if(params.indexOf("?") == 0 && params.indexOf("=") > 1){
        params = params.substring(1, params.length);
        if(params.indexOf("&") > 1){
            var paramsArr = params.split("&");
            var isHave = false;
            for(var i in paramsArr) {
                var tempArr = paramsArr[i].split("=");
                if(tempArr[0].toLowerCase() == param.toLowerCase()){
                    isHave = true;
                    tempArr[1] = val;
                    paramsArr[i] = tempArr.join("=");
                }
            }
            if(!isHave){
                paramsArr.push(param + "=" + val);
            }
            paramStr += paramsArr.join("&");
        }else{
            tempArr = params.split("=");
            if(tempArr[0].toLowerCase() == param.toLowerCase()){
                tempArr[1] = val;
                paramStr += tempArr.join("=");
            }else{
                paramStr += params +"&" + param + "=" + val;
            }
        }
    }else{
        paramStr += param + "=" + val;
    }
    return paramStr;
}