var win = null; 
function abreweb(mypage,myname,w,h,scroll){
LeftPosition = 0;
TopPosition = 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',fullscreen=1,scrollbars=no'
win = window.open(mypage,myname,settings)
}
function abreSistema(u){ 
  if (screen.width+"x"+screen.height == "800x600"){
	w=650; h=400; l=50; t=50;
  }else{
	w=650; h=400; l=50; t=50;
  }
  settings ='height='+h+',width='+w+',top='+t+',left='+l+',scrollbars=yes,resizable=no' 
  win = window.open(u,'sistema',settings);
  win.focus();
  win.moveTo(l,t);
} 
function maximizaWin(){
top.window.moveTo(0,0);
if (document.all) {
 top.window.resizeTo(screen.availWidth,screen.availHeight);
}
else 
 if (document.layers||document.getElementById) {
 	 if (top.window.outerHeight<screen.availHeight||top.window.outerWidth<screen.availWidth){
		 top.window.outerHeight = screen.availHeight;
		 top.window.outerWidth = screen.availWidth;
     }
 }
return true;
}