// ajax.js


function CreateDownloadLog( url ) { 
	//alert("CreateDownloadLog url=" + url  ); 
    try {
		//if( retvalu == null || retvalu == "" ) { retvalu = "ok" ; }
		
		var ThisForm = document.forms[0];
		

		var ThisURL = ThisDBurl ;
		ThisURL += "/CreateDownloadLogAgent?open" ;   		// Agent that returns text
		ThisURL += "&url=" + url ;			
	    ThisURL += "&tim=" + escape(new Date()) ;		
		//alert("ThisURL=" + ThisURL );

		//window.location.href = ThisURL ;
		//openPopup(ThisURL) ;
		//return ;

	
        // instantiate http_request
        var http_request = getHTTPRequestObj() ;
       if( http_request == null ) {return false; }
        
	    // call function to handle return code     
        http_request.onreadystatechange = function() { handleCreateDownloadLog(http_request, url ); };
        http_request.open('GET', ThisURL, true);
        http_request.send(null);                     	
		
	}
	catch(e) {
		alert( "ajax.js - CreateDownloadLog:\n" + e.message );
		return;
	}
	
}



function handleCreateDownloadLog(http_request, url ) {
    // called by SetFieldByAgentReturn after data is returned
    
	//alert("handleCreateDownloadLog url= " + url);
	//alert("handleCreateDownloadLog - http_request.status=" + http_request.status );
    
    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
            //var responseText = http_request.responseText;
            //alert("handleAddressReturn: " + responseText );
		//alert("http_request.responseText=" + http_request.responseText );
            try {
              //alert("responseheader=" + http_request.getAllresponseheaders()); 

		     	var mymsg = http_request.responseText ;
		     	mymsg = left(mymsg,mymsg.length -1);
		     	//alert("mymsg=" + mymsg);
		     	//alert("handleCreateDownloadLog url= " + url);
		     	
		     	if( left(mymsg,4) == "msg-" ) {
		     		mymsg = strRight(mymsg,"msg-") ;
		     		alert( mymsg  );
					return;					// Das auskommentieren,wenn die msg in gelb angezeigt werden soll
		     	}
		     	else if( left(mymsg,4) == "url-" ) {
		     		// Download starten
		     		//alert("mymsg2=" + mymsg);
		     		// var myurl = strRight(mymsg,'-');
		     		var myurl = url ;
		     		//alert("myurl= " + myurl);
		     		openPopup( myurl, 800, 800,"DownloadWin" ) ;
		     		return;  
		     	}
		     	else if( left(mymsg,3) == "ok-" ) {
		     		mymsg = strRight(mymsg,"ok-") ; 		     		
		     		//alert("mymsg=" + mymsg + "-" );
		     		if( mymsg == "" ) {			
						return; 
					}
					else if(mymsg == "reload" ) {
						//alert("reload");
						status = "reload";
						window.location.href = window.location.href ;
						return;
					}
					
		     	}		
		     	else if( left(mymsg,2)  == "ok" ) {
						return; 
		     	}	     	
		     	else {
		     		mymsg = "Fehler in handleCreateDownloadLog, Agent meldet:<br>" + mymsg ;
		     	}
		     	//alert("ho");
		     	ShowAjaxMsg(mymsg);
		     	
	     		return;		    		  
				
		      
	    	}
	    	catch(e) {
		       alert( "ShowAddressMsg - handleSetFieldByAgentReturn:\n" + e.message );
	           return;    
               
            }            
               
        } 
        else {
            alert('There was a problem with the request: ' + http_request.responseText);
        }
    }



}           // End handleSetFieldByAgentReturn




// *********************************************************************
// ************************* AJAX-Helper ************************************
// *********************************************************************

 function getHTTPRequestObj() {
    //alert("getHTTPRequestObj");
    var http_request = null ;

    if (window.XMLHttpRequest) { 			// Mozilla, Safari, ...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');            
        }
    } 
    else if (window.ActiveXObject) { 		// IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
            //alert("Msxml2.XMLHTTP");
        } 
        catch (e) {
            
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
                //alert("Microsoft.XMLHTTP");
            } 
            catch (e) {
            }
        }
    }
 
    if (!http_request) {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return null;
    }
    return http_request ;
 }          // end of getHTTPRequestObj
 
function ShowAjaxMsg(msg) {
	alert("ShowAjaxMsg\n" + msg);
	
	var html = '<div style="position:absolute;background-color:yellow;color:black;width:99%;padding:4px;padding-left:8px;padding-right:4px;">' ;
	html += msg ;
	html += '</div>';	
	
	var id = "AjaxMsgWrapper";
	var o = document.getElementById(id);
	if(o) {
		o.innerHTML = html ;
		o.style.display = 'block' ;
	}
}