// convert all characters to lowercase to simplify testing 
var agt=navigator.userAgent.toLowerCase(); 

//BROWSER VERSION
// Note: On IE5, these return 4, so use is_ie5up to detect IE5. 
var is_major = parseInt(navigator.appVersion); 
var is_minor = parseFloat(navigator.appVersion); 

//BROWSER TYPE 
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1) 
            && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) 
            && (agt.indexOf('webtv')==-1));
var is_nav4up = (is_nav && (is_major >= 4));  
var is_ie   = (agt.indexOf("msie") != -1); 
var is_ie3  = (is_ie && (is_major < 4)); 
var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) );
var is_ie4up  = (is_ie  && (is_major >= 4));
var is_ie5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );  
var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);  
var is_dom = (document.getElementById);

//PLATFORM 
var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
var is_mac    = (agt.indexOf("mac")!=-1);
var is_sun   = (agt.indexOf("sunos")!=-1);
var is_irix  = (agt.indexOf("irix") !=-1);    // SGI
var is_hpux  = (agt.indexOf("hp-ux")!=-1);
var is_aix   = (agt.indexOf("aix") !=-1);      // IBM
var is_linux = (agt.indexOf("inux")!=-1);
var is_sco   = (agt.indexOf("sco")!=-1) || (agt.indexOf("unix_sv")!=-1);
var is_unixware = (agt.indexOf("unix_system_v")!=-1); 
var is_mpras    = (agt.indexOf("ncr")!=-1); 
var is_reliant  = (agt.indexOf("reliantunix")!=-1);
var is_dec   = ((agt.indexOf("dec")!=-1) || (agt.indexOf("osf1")!=-1) || 
       (agt.indexOf("dec_alpha")!=-1) || (agt.indexOf("alphaserver")!=-1) || 
       (agt.indexOf("ultrix")!=-1) || (agt.indexOf("alphastation")!=-1)); 
var is_sinix = (agt.indexOf("sinix")!=-1);
var is_freebsd = (agt.indexOf("freebsd")!=-1);
var is_bsd = (agt.indexOf("bsd")!=-1);
var is_unix  = ((agt.indexOf("x11")!=-1) || is_sun || is_irix || is_hpux || 
             is_sco ||is_unixware || is_mpras || is_reliant || 
             is_dec || is_sinix || is_aix || is_linux || is_bsd || is_freebsd);

function init() {
  if(is_ie) {
	  genObj="document.all"
	  genStyle=".style"
  }
  if(is_nav) {
	  genObj="document.layers"
	  genStyle=""
  }
}
 
init();

function createObj(divName) {
	if(is_dom) {
		var stand_obj=document.getElementById(divName);
		if (stand_obj && stand_obj.style) var obj=stand_obj.style;
		else obj = "";
	} else {
		var obj=eval(genObj+"['"+divName+"']"+genStyle);
	}  
	return obj; 
}

var mvis, mhid;

if (document.layers) {
	mvis = 'show';
	mhid = 'hide';
}	else if (document.all) {
	mvis = 'visible';
	mhid = 'hidden';
}	else if (document.getElementById) {
	mvis = 'visible';
	mhid = 'hidden';
}

function showsubmenu(s) {
	if (document.layers) {
		if (document.layers["tu" + s].visibility == mvis) return;
	} else {
		if (document.getElementById("tu" + s).style.visibility == mvis) return;
	}
	var ex = false;
	var i = 1;
	while (!ex ) {
		if (document.layers) {
			if (!document.layers["tu" + i]) {
				ex = true;
			}
		} else {
			if (!document.getElementById("t" + i)) {
				ex = true;
			}
		}
		if (!ex) {
			hidesubmenu(i);
		}
		i++;
	}
	show("tu" + s);
	ex = false;
	i = s + 1;
	var x;
	while (!ex ) {
		if (document.layers) {
			if (document.layers["t" + i]) {
				document.layers["t" + i].top += 26 * cntSub[s];
			} else ex = true;
		} else {
			if (document.getElementById("t" + i)) {
				if (document.all) {
					document.getElementById("t" + i).style.pixelTop += 26 * cntSub[s];
				} else {
					x = parseInt(document.getElementById("t" + i).style.top);
					document.getElementById("t" + i).style.top = x + (26 * cntSub[s]) + "px";
				}
			} else ex = true;
		}
		i++;
	}
	if (document.layers) {
		document.layers("navlogo").top += 26 * cntSub[s];
	} else {
		if (document.all) {
			document.getElementById("navlogo").style.pixelTop += 26 * cntSub[s];
		} else {
			x = parseInt(document.getElementById("navlogo").style.top);
                        document.getElementById("navlogo").style.top = x + (26 * cntSub[s]) + "px";
		}
	}	
}

function hidesubmenu(s) {
	if (document.layers) {
		if (document.layers["tu" + s].visibility == mhid) return;
	} else {
		if (document.getElementById("tu" + s).style.visibility == mhid) return;
	}
	var ex = false;
	var i = s + 1;
	while (!ex ) {
		if (document.layers) {
			if (document.layers["t" + i]) {
				document.layers["t" + i].top -= 26 * cntSub[s];
			} else ex = true;
		} else {
			if (document.getElementById("t" + i)) {
				if (document.all) {
					document.getElementById("t" + i).style.pixelTop -= 26 * cntSub[s];
				} else {
					x = parseInt(document.getElementById("t" + i).style.top);
					document.getElementById("t" + i).style.top = x - (26 * cntSub[s]) + "px";
				}
			} else ex = true;
		}
		i++;
	}
	hide("tu" + s);
        if (document.layers) {
                document.layers("navlogo").top -= 26 * cntSub[s];
        } else {
                if (document.all) {
                        document.getElementById("navlogo").style.pixelTop -= 26 * cntSub[s];
                } else {
                        x = parseInt(document.getElementById("navlogo").style.top);
                        document.getElementById("navlogo").style.top = x - (26 * cntSub[s]) + "px";
                }
        }
}

function show(divName) {
  if ((typeof divName == "undefined") || (divName == "")) return (-1);
  var obj = createObj(divName);
  if ((typeof obj == "undefined") || (obj == "")) return (-1);
  obj.visibility='visible';
	return(1);
}

function hide(divName) {
  if ((typeof divName == "undefined") || (divName == "")) return (-1);
  var obj = createObj(divName);
  if ((typeof obj == "undefined") || (obj == "")) return (-1);
  obj.visibility='hidden';
  return(1);
}

// ------------------------------------------------------

function show_sendarticle(alink,art) {
	winSendArticle = window.open('/sendarticle.php?art=' + art + '&lnk=' + alink,'winSendArticle','left=50,top=50,width=300,height=180,menu=no,toolbar=no,scrollbars=no,status=no');
	winSendArticle.focus();
}

function close_sendarticle() {
	winSendArticle.close();
}

function show_callback() {
	winCallBack = window.open('/callback.php','winCallBack','left=50,top=50,width=300,height=180,menu=no,toolbar=no,scrollbars=no,status=no');
	winCallBack.focus();
}

function close_callback() {
	winCallBack.close();
}