URL地址追加

/*
url:地址
paramStr:追加的内容{string}

return String
*/

function urlAppend(url,paramStr){    var newUrl = url;    if(paramStr){        var parts = (url + " ").split(/[?&]/);        newUrl += (parts.pop()) === " " ?        paramStr:        parts.length ? "&" +paramStr :"?"+paramStr);    }    return newUrl;}