JavaScript 实用方法库

/**//*
/* JavaScript Document
*/

/**//* Calculate the length of character string */
String.prototype.len=function()
{
    return this.replace(/[^x00-xff]/g, "**").length;
}

/**//* Take out the blank both on left and right */
String.prototype.trim=function()
{
    return this.replace(/(^[\s+|　+])|([\s+|　+]$)/g,"");
}

/**//* Take out the left blank */
String.prototype.ltrim = function()
{
    return this.replace(/(^[\s+|　+])/g, "");
}

/**//* Take out the right blank */
String.prototype.rtrim = function()
{
    return this.replace(/([\s+|　+]$)/g, "");
}

/**//* Take out left and right blank and replace multi-blank by one blank */
String.prototype.atrim = function() 
{ 
    return this.replace(/(^[\s+|　+])|([\s+|　+]$)/g,"").replace(/\s+|　+/g," ");
}
    
/**//* Getting the version of browser 1-IE, 2-Firefox */ 
function getOs()
{
    if(navigator.userAgent.indexOf("MSIE")>0)return 1;
    if(isFirefox=navigator.userAgent.indexOf("Firefox")>0)return 2;
    return 0;
}

function RedirectLanguage(language)
        {
            var urlValue=window.location.href;
            var returnURL=urlValue;
            var indexOfQuestionMark=urlValue.indexOf("?");
            if(indexOfQuestionMark>0)
            {
                var arrayUrl=urlValue.split('?');
                var arrayParameter=arrayUrl[1].split('&');
                var indexOfLang=arrayParameter[0].indexOf("Lang");
                if(indexOfLang==0)
                {
                    returnURL=urlValue.replace(arrayParameter[0],"Lang="+language);
                }
                else
                {
                    returnURL=arrayUrl[0]+"?Lang="+language+"&"+arrayUrl[1];
                }
            }
            else
            {
                returnURL=urlValue.replace(/(\/+$)/g, "")+"?Lang="+language;
            }
            window.location.href=returnURL; 
        }