var ddwindowlinks={
    excludedomains: ["frustratedcustomers.co.uk"],
    linktarget: "_blank",
    //Specify operating mode ("auto" or "manual"):
    mode: "auto",

    //If mode is "manual", customize checkbox HTML to show to users (Preserve id attribute):
    toggleHTML: '<form><input type="checkbox" id="targetcheckbox" checked="checked" /><label for="targetcheckbox">Open off-site links in new window?</label></form>',

    //If mode is "manual", enable user persistence so the state of the checkbox is remembered?
    persist: true,

    assigntarget:function(){
        var rexcludedomains=new RegExp(this.excludedomains.join("|"), "i")
        var all_links=document.getElementsByTagName("a")
        if (this.mode=="auto" || (this.mode=="manual" && this.togglebox.checked)){
            for (var i=0; i<=(all_links.length-1); i++){
                if (all_links[i].hostname.search(rexcludedomains)==-1 && all_links[i].href.indexOf("http:")!=-1)
                    all_links[i].target=ddwindowlinks.linktarget
            }
        }
        else{
            for (var i=0; i<=(all_links.length-1); i++)
                all_links[i].target=""
        }
        if (this.mode=="manual" && this.persist)
            this.setCookie("dlinktarget", (this.togglebox.checked)? "yes" : "no", 30) //remember user setting for 30 days (set to -1 then reload page to erase cookie)
    },

    init:function(){
        if (document.getElementById && this.mode=="manual"){
            document.write(this.toggleHTML)
            this.togglebox=document.getElementById("targetcheckbox")
            this.togglebox.onclick=function(){
                ddwindowlinks.assigntarget()
                }
            if (this.persist && this.getCookie("dlinktarget")!="")
                this.togglebox.checked=(this.getCookie("dlinktarget")=="yes")? true : false
        }
        if (window.addEventListener)
            window.addEventListener("load", function(){
                ddwindowlinks.assigntarget()
                }, false)
        else if (window.attachEvent)
            window.attachEvent("onload", function(){
                ddwindowlinks.assigntarget()
                })
    },

    getCookie:function(Name){
        var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
        if (document.cookie.match(re)) //if cookie found
            return document.cookie.match(re)[0].split("=")[1] //return its value
        return ""
    },

    setCookie:function(name, value, days){
        var expireDate = new Date()
        //set "expstring" to either an explicit date (past or future)
        var expstring=expireDate.setDate(expireDate.getDate()+parseInt(days))
        document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/"
    }

}

ddwindowlinks.init()