Javascript Permission Denied

I am getting permission denied error using this code:

I am trying to get marquee from other website. Please help me

<script>
var currentState = 'started';
    function tickerPlay(dir){
        var tickerObj = document.getElementById('tickerObj');
        var pauseImage = document.getElementById('pauseImage');
        if (dir == 1) {
            tickerObj.direction = 'left'; 
            tickerObj.start(); 
            currentState = 'stopped';
            pauseImage.click();
        }else if(dir == -1) {
            tickerObj.direction = 'right'; 
            tickerObj.start(); 
            currentState = 'stopped';
            pauseImage.click();
        }else {
            // save last dir, restart
            if (currentState == 'started') { 
                tickerObj.stop();
                event.srcElement.src = event.srcElement.playImage;
                currentState = 'stopped';
            }else {
                event.srcElement.src = event.srcElement.stopImage;
                tickerObj.start();
                currentState = 'started';
            }
            
            
        }
    }
[B] var xmlHttp;
var sURL = 'http://www2.dsm.com.qa/DSMTicker/ticker.htm';
/////DSM 20 IDX /////
function RequestTicker()
{ 
    var url= sURL + "";
    //var url= "ticker1.htm";
    xmlHttp=GetXmlHttpObjectTicker(onSuccessTicker) 
    xmlHttp.open("GET", url , true) 
    xmlHttp.send(null) 
}[/B]

function onSuccessTicker() 
{ 
    var resp = "";
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
    { 
        //alert(xmlHttp.responseText); 
        var marqObj = document.getElementById('tickerObj');
        resp = xmlHttp.responseText;
        var dt = resp.split(';');
        var ln = dt.length;
        var ch=0;
        if(marqObj.innerHTML == "")
            ch = 1; 
            var ticker = '';//'<MARQUEE class=ticker id=tickerObj dir=ltr onmouseover=this.scrollDelay=35; onmouseout=this.scrollDelay=20; trueSpeed scrollAmount=1 scrollDelay=20 width="99%">'
        for(var i=0;i<ln-5;i=i+5)
        {
            var img = String(dt[i]);
            var ar  = dt[i+1];
            var eng = dt[i+2];
            var clr = String(dt[i+3]).substr(2);
            var url = dt[i+4];
            var id  = img.substr(img.indexOf('/images/')+8, 4);
            if(ch == 1){
            ticker =  ticker 
                +  '<SPAN dir=ltr style="CURSOR: hand" onclick="window.location=\'/dsm/EN_' + String(id).toUpperCase() + '?id=' + String(id).toUpperCase() +'\'">'
            +  '<span dir=ltr><img src="' + img + '"></span>'
            +  '<SPAN dir=ltr id=' + id + ' style="font-size: 13px;font-weight: bold;color: #' + clr + '">' + eng + '</SPAN>'
            +  '</SPAN>'
            +'&nbsp;&nbsp;'
            }
            else
                document.getElementById(id).innerHTML = eng;
        }
        if(ch == 1)
            marqObj.innerHTML = ticker;
    } 
} 

///End 20 DSM IDX/////

function GetXmlHttpObjectTicker(handler)
{ 
    var objXmlHttp=null

    if (navigator.userAgent.indexOf("Opera")>=0)
    {
        alert("This example doesn't work in Opera") 
        return 
    }
    if (navigator.userAgent.indexOf("MSIE")>=0)
    { 
        var strName="Msxml2.XMLHTTP"
        if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
            {
                strName="Microsoft.XMLHTTP"
            } 
        try
        { 
            objXmlHttp=new ActiveXObject(strName)
            objXmlHttp.onreadystatechange=handler 
            return objXmlHttp
        } 
        catch(e)
        { 
            alert("Error. Scripting for ActiveX might be disabled") 
            return 
        } 
    } 
    if (navigator.userAgent.indexOf("Mozilla")>=0)
    {
        objXmlHttp=new XMLHttpRequest()
        objXmlHttp.onload=handler
        objXmlHttp.onerror=handler 
        return objXmlHttp
    }
}

RequestTicker();
setInterval(RequestTicker,5000);
</script>

Code (markup):

 

I don't think you can interact with another website in this way, because of browser cross-site scripting security - see http://en.wikipedia.org/wiki/Cross-site_scripting.

 

Does this error occur in Firefox only? Or does it happen in IE too?