var MaxMenuItems 	= 100;

function ShowMenu(MenuNo) {
    
    if (document.getElementById("Submenu" + MenuNo)) { 
	document.getElementById("Submenu" + MenuNo).style.visibility = "visible";
    }
}

function HideMenu(MenuNo) {
    
    if (document.getElementById("Submenu" + MenuNo)) { 
	document.getElementById("Submenu" + MenuNo).style.visibility = "hidden";
    }
}

// ExceptNo - multiple params like 1,3,8
function HideMenuAll(ExceptNo) {

    var i;
    var arr;
    var found;
    ExceptNo = ExceptNo + ',';
    arr = ExceptNo.split(",");
    
    for(i = 1; i <= MaxMenuItems; i++) { 

	found = 0;
	for (x in arr) {
	    if (arr[x] == i) {
		found = 1;
	    }
	}	
    
        if ((found == 0) && (document.getElementById("Submenu" + i))) { 
            document.getElementById("Submenu" + i).style.visibility = "hidden";
        }
    }
}


// IMAGE BUTTONS

function SwitchImg()
{ 
  var rem, keep=0, store, obj, switcher=new Array, history=document.Data;
    for (rem=0; rem < (SwitchImg.arguments.length-2); rem+=3) {
    	store = SwitchImg.arguments[(navigator.appName == 'Netscape')?rem:rem+1];
    if ((store.indexOf('document.layers[')==0 && document.layers==null) ||
        (store.indexOf('document.all[')==0 && document.all==null))
         store = 'document'+store.substring(store.lastIndexOf('.'),store.length);
         obj = eval(store);
    if (obj != null) {
   	   switcher[keep++] = obj;
      switcher[keep++] = (history==null || history[keep-1]!=obj)?obj.src:history[keep];
      obj.src = SwitchImg.arguments[rem+2];
  } }
  document.Data = switcher;
}

function RestoreImg()
{
  if (document.Data != null)
    for (var rem=0; rem<(document.Data.length-1); rem+=2)
      document.Data[rem].src=document.Data[rem+1];
}

// TreeCollapse, TreeExpand
function TreeExpandToogle(ID) {
    var ExpandButton	= document.getElementById("tree_expand"+ID);
    var ExpandArea	= document.getElementById("tree"+ID);
    if (ExpandArea) {
        if (ExpandArea.style.display == "") {
	    if (ExpandButton) 
    	        ExpandButton.innerHTML	= "<img src='./files/admin/button_expand.gif' alt='' />";
	    ExpandArea.style.display	= "none";
	} else {
	    if (ExpandButton) 
		ExpandButton.innerHTML	= "<img src='./files/admin/button_collapse.gif' alt='' />";
    	    ExpandArea.style.display	= "";
	}
    }
}

// Popup window
function PopupNewWindow(url, width, height, params) {
    if (params == "")
	params = 'toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=no';
    var left = (screen.width - width) / 2;
    var top  = (screen.height - height) / 2;
    params = params + ',width=' + width + ',height=' + height + ',screenX=' + left + ',screenY=' + top;
    window.open(url, '' ,params); 
}

//

// reload element using ajax..
function Ajax(ElementName, URL) {
    var request = null;
    try { 
	request = new XMLHttpRequest();
    }
    catch(e) {
	try { 
	    request = new ActiveXObject('Microsoft.XMLHTTP'); 
	}
	catch(e) {
        }
    }
    if (request != null) {
	request.onreadystatechange = function() {
    	    if (request.readyState == 4) {
    		if (request.status == 200) {
    		    document.getElementById(ElementName).innerHTML = request.responseText;
    		}
            }
	}
    }
    request.open("GET", URL + '&Ajax=' + ElementName, true);
    request.send(null);
}

// GalleryShow - display gallery window, set position..
function GalleryShowWindow() {
    var Control = document.getElementById("gallery");
    if (Control) {
	Control.style.display 	= "block";
	Control.style.position	= "absolute"; 
	window.scrollTo(0,0);	
//	alert(pageYOffset);
    }
}

// GalleryHid - hide gallery window
function GalleryHideWindow() {
    var Control = document.getElementById("gallery");
    if (Control) {
	Control.style.display = "none";
    }
}

// display gallery image
function GalleryShowFromURL(ImageURL) {
    GalleryShowWindow();
    Ajax('gallery', '?Proc=gallery&ImageURL='+ImageURL+'');
}

function GalleryShowByGalleryID(GalleryID, AttachmentType) {
    GalleryShowWindow();
    Ajax('gallery', '?Proc=gallery&GalleryID=' + GalleryID + '&AttachmentType=' + AttachmentType);
}

function GalleryShowForAttachmentID(AttachmentID, AttachmentType) {
    GalleryShowWindow();
    Ajax('gallery', '?Proc=gallery&AttachmentID=' + AttachmentID + '&AttachmentType=' + AttachmentType);
}

function PreloadGalleryImage(URL) {

    var GS  = document.getElementById('gallery');
    var GSP = document.getElementById('gallery_picture_frame');
    var GSN = document.getElementById('gallery_navigator');
    var Pic = document.getElementById("gallery_picture");
    var GalleryImage = new Image();
    var ScreenWidth  = 0;
    var ScreenHeight = 0;
    
    // height
    var theHeight = 0;
    if (window.innerHeight) {
     theHeight=window.innerHeight;
    } else 
      if (document.documentElement && document.documentElement.clientHeight) {
         theHeight=document.documentElement.clientHeight;
      } else 
        if (document.body) {
          theHeight=document.body.clientHeight;
        }
    ScreenHeight = theHeight;
    
    // width
    var theWidth = 0;
    if (window.innerWidth) {
     theWidth=window.innerWidth;
    } else 
      if (document.documentElement && document.documentElement.clientWidth) {
         theWidth=document.documentElement.clientWidth;
      } else 
        if (document.body) {
          theWidth=document.body.clientWidth;
        }
    ScreenWidth = theWidth;



    function GalleryResize(NewWidth, NewHeight) {
	if (NewWidth == 0) {
	  NewWidth = 400;
	}
	if (NewHeight == 0) {
	  NewHeight = 400;
	}
	var toolbar;
	if (GSN == null) {
	    toolbar = 0;
	} else {
	    toolbar = 24;
	    GSN.style.display 	= "block";
	    GSN.style.position	= "absolute"; 
	    GSN.style.left	 = "16px";
	    GSN.style.top	 = "16px";
	    GSN.style.width  = NewWidth + "px";
	    GSN.style.height = "24px";
	}
	GSP.style.display 	= "block";
	GSP.style.position	= "absolute"; 
	GSP.style.left	 = "16px";
	GSP.style.top	 = (16+toolbar)+"px";
	GSP.style.width  = NewWidth + "px";
	GSP.style.height = NewHeight + "px";
	GS.style.left    = ((ScreenWidth-NewWidth-32) / 2) + "px";
	GS.style.top     = ((ScreenHeight-NewHeight-32-toolbar) / 2) + "px";
	GS.style.width   = (NewWidth+32) + "px";
	GS.style.height  = (NewHeight+32+toolbar) + "px";
    }

    function ImageLoaded() {
	// RESIZE WINDOW
	var NewWidth 	 = GalleryImage.width;
	var NewHeight	 = GalleryImage.height;
	var Prop	 = 0;
	if (NewWidth == 0)   
	    NewWidth = 400;
	if (NewHeight == 0)   
	    NewHeight = 400;
	if ((NewWidth > ScreenWidth - 64) || (NewHeight > ScreenHeight - 88)) {
	    if ((NewWidth / (ScreenWidth - 64)) <= (NewHeight / (ScreenHeight - 88))) {	        
	        Prop 	  = (NewHeight / (ScreenHeight - 88));
		if (Prop > 0) {
		    NewWidth  = NewWidth / Prop;
		    NewHeight = NewHeight / Prop;
		}
	    } else {	    
	        Prop 	  = (NewWidth / (ScreenWidth - 64));
		if (Prop > 0) {
		    NewWidth  = NewWidth / Prop;
		    NewHeight = NewHeight / Prop;
		}
	    }
	}		

//	alert('G6');
	Pic.src 	= GalleryImage.src;
	GalleryResize(NewWidth, NewHeight);
	Pic.width 	= NewWidth;
	Pic.height	= NewHeight;
    }


    GalleryImage.onload = ImageLoaded;
    GalleryImage.src  = URL;
}