function ocr_callback(ocrtext){
   var tb = document.getElementById("wpTextbox1");
   tb.value = ocrtext;
   tb.disabled=false;
}

function add_ocr() {
    var tb = document.getElementById("wpTextbox1");
    tb.disabled=true;
    var input = document.getElementById("wpOcr");
    if(input) input.disabled=true;
    if( proofreadPageWidth <= 1024 ) thumb_url = proofreadPageViewURL;
    else thumb_url = proofreadPageThumbURL.replace('##WIDTH##',1024); 
    request_url = "http://toolserver.org/~thomasv/ocr.php?url="+thumb_url+"&lang="+wgContentLanguage+"&user="+wgUserName;
    var scriptObj = document.createElement("script");
    scriptObj.setAttribute("type", "text/javascript");
    scriptObj.setAttribute("src", request_url);
    scriptObj.setAttribute("id", "ocr_cb");
    var headLoc = document.getElementsByTagName("head").item(0);
    headLoc.appendChild(scriptObj);
}
 

function addOCRButton2(id,comment,source,onclick){
 
	var tb  = document.getElementById("toolbar"); 
	if(tb){
		var image = document.createElement("img");
		image.width = 46;
		image.height = 22;
		image.border = 0;
		image.className = "mw-toolbar-editbutton";
		image.style.cursor = "pointer";
		image.alt = "OCR";
		image.title = comment;
		image.src = source;
		image.onclick = onclick;
		tb.appendChild(image);
        }
}


function fraktur_ocr(){
   self.wgContentLanguage = "de-f";
   add_ocr();
   self.wgContentLanguage = "de";
}


function addOCRButton(){

    if(!self.proofreadPageIsEdit) return;
    if(!self.proofreadPageViewURL) return;
    //if(wgCurRevisionId) 

    if(self.wgDBname == "dewikisource"){
       addOCRButton2("wpOcr","Normale OCR","http://upload.wikimedia.org/wikipedia/commons/e/e0/Button_ocr.png",add_ocr);
       addOCRButton2("wpOcr","Fraktur OCR","http://upload.wikimedia.org/wikipedia/commons/a/af/Button_Fractur_OCR.png",fraktur_ocr);
    }
    else addOCRButton2("wpOcr","Get the text by OCR","http://upload.wikimedia.org/wikipedia/commons/e/e0/Button_ocr.png",add_ocr);

}

if(!self.proofreadpage_disable_ocr) addOnloadHook(addOCRButton);