js 替換 當前URL 特定參數

//替換指定傳入參數的值,paramName為參數,replaceWith為新值
function replaceParamVal(paramName,replaceWith) {
    var oUrl = this.location.href.toString();
    var re=eval('/('+ paramName+'=)([^&]*)/gi');
    var nUrl = oUrl.replace(re,paramName+'='+replaceWith);
    this.location = nUrl;
}