popWindow=null;
function open_window(url,width,height) {
	open_window_byname("black",url,width,height);
}

function open_window2(url,width,height) {
	open_window_byname_with_menu("blacker",url,width,height);
}

function open_large_window(url)
	{
	screenX = 1;
	screenY = 1;
	width   = screen.width-12;
	height  = screen.height-124;

	window.open(url, 'large', 'titlebar=1,location=0,status=0,toolbar=1,menubar=1,resizeable=1,scrollbars=1,left=' + screenX + ',top=' + screenY + ',width=' + width + ',height=' + height);
	}

function open_window_byname(windowName,url,width,height) {

 agent=navigator.appVersion;
 version=parseInt(agent);
 
//figure out the top/left of the screen
//taking the menu bar into consideration
 if (version>=4) {
  leftCorner=screen.width/2 - width/2;
  topCorner=screen.height/2 - height/2;
 }else{
  leftCorner=20;
  topCorner=20;
 }
 features=",screenX="+leftCorner+",screenY="+topCorner+",left="+leftCorner+",top="+topCorner;
 features=features+",titlebar=1,scrollbars=1";
 if (popWindow==null) {
  popWindow=open(url,windowName, "width="+width+",height="+height+ features);
  // for IE3, focus, closed, and opener doesn't work, so we have to tell
  // the window opened who's the opener
  if (version<3) 
   setTimeout("popWindow.mama=window",250);
 }else{
  if (version<3) {
   popWindow.close();
   popWindow=null;
   setTimeout("open_window('"+url+"',"+width+","+height+")", 250);
   setTimeout("popWindow.mama=window",500);
  }else if (!popWindow.closed){
   popWindow.close();
   popWindow=null;
   setTimeout("open_window('"+url+"',"+width+","+height+")", 250);
   
  }else{
   popWindow=null;
   popWindow=open(url,windowName, "width="+width+",height="+height+features);
  }
 }
}

function open_window_byname_with_menu(windowName,url,width,height) {

 agent=navigator.appVersion;
 version=parseInt(agent);
 
//figure out the top/left of the screen
//taking the menu bar into consideration
 if (version>=4) {
  leftCorner=screen.width/2 - width/2;
  topCorner=screen.height/2 - height/2;
 }else{
  leftCorner=20;
  topCorner=20;
 }
 features=",screenX="+leftCorner+",screenY="+topCorner+",left="+leftCorner+",top="+topCorner;
 features=features+",toolbar=1,scrollbars=0,resizable=1";
 if (popWindow==null) {
  popWindow=open(url,windowName, "width="+width+",height="+height+ features);
  // for IE3, focus, closed, and opener doesn't work, so we have to tell
  // the window opened who's the opener
  if (version<3) 
   setTimeout("popWindow.mama=window",250);
 }else{
  if (version<3) {
   popWindow.close();
   popWindow=null;
   setTimeout("open_window('"+url+"',"+width+","+height+")", 250);
   setTimeout("popWindow.mama=window",500);
  }else if (!popWindow.closed){
   popWindow.close();
   popWindow=null;
   setTimeout("open_window('"+url+"',"+width+","+height+")", 250);
   
  }else{
   popWindow=null;
   popWindow=open(url,windowName, "width="+width+",height="+height+features);
  }
 }
}
 
function open_new_window(url) {

 agent=navigator.appVersion;
 version=parseInt(agent);
 
 features="titlebar=1,scrollbars=1,location=1,toolbar=1,resizable=1";
 if (popWindow==null) {
  popWindow=open(url,"_blank", features);
  // for IE3, focus, closed, and opener doesn't work, so we have to tell
  // the window opened who's the opener
  if (version<3) 
   setTimeout("popWindow.mama=window",250);
 }else{
  if (version<3) {
   popWindow.close();
   popWindow=null;
   setTimeout("open_window('"+url+"')", 250);
   setTimeout("popWindow.mama=window",500);
  }else if (!popWindow.closed){
   popWindow.close();
   popWindow=null;
   setTimeout("open_window('"+url+"')", 250);
   
  }else{
   popWindow=null;
   popWindow=open(url,"_blank", features);
  }
 }
}