var browser;
  if( document.all ){
    browser = 'IE';
    h_diff = 0;
  }else if( document.getElementById ){
    browser = 'NN6';
  }else if( document.layers ){
    browser = 'NN4';
  }

// visible popup //

function visMenu(item){
  if( document.all ){
    thisObj = document.all(item);
    if( thisObj ) if( thisObj.style.visibility=='hidden' ){
      thisObj.style.visibility = 'visible'
    }
  }else if( document.getElementById ){
    thisObj = document.getElementById(item);
    if( thisObj ) if( thisObj.style.visibility=='hidden' ){
      thisObj.style.visibility = 'visible'
    }
  }else if( document.layers ){
    item = "N" + item;
    thisObj = document.layers[item];
    if (thisObj) if(thisObj.visibility=='hide'){
      thisObj.visibility = 'show';
    }
  }
}

// invisible popup //

function invMenu(item){
  if( document.all ){
    thisObj = document.all(item);
    if (thisObj) if(thisObj.style.visibility=='visible'){
      thisObj.style.visibility = 'hidden'
    }
  }else if( document.getElementById ){
    thisObj = document.getElementById(item);
    if( thisObj ) if( thisObj.style.visibility=='visible' ){
      thisObj.style.visibility = 'hidden'
    }
  }else if( document.layers ){
    item = "N" + item;
    thisObj = document.layers[item];
    if (thisObj) if(thisObj.visibility=='show'){
      thisObj.visibility = 'hide';
    }
  }
}



/* NN4用にResize時にReloadする */

reloadCnt = 0;
function MyReload(){
  if( document.layers ){
    var appVer = navigator.appVersion;
    reloadCnt ++;
    if( appVer.indexOf( "Macintosh" ) != -1 ||
      appVer.indexOf( "4.0" ) == -1 ||
      ( appVer.indexOf( "4.0" ) != -1 && reloadCnt > 2 )
    ){
      reloadCnt = 0;
      location.reload();
    }
  }
}

/* 小ウィンドウ表示 */
<!--
var Htm_name="";
function WindowOpen(Htm_name,H,W){
var Win=window.open(Htm_name,"view",'scrollbars,height='+H+',width='+W+'');
if(navigator.appVersion.charAt(0)>=3){Win.focus()};
};
// -->

/* リンクウィンドウ表示 */

var ns4=document.layers
var ie4=document.all
var ns6=document.getElementById&&!document.all

//drag drop function for NS 4////
/////////////////////////////////

var dragswitch=0
var nsx
var nsy
var nstemp

function drag_dropns(name){
if (!ns4)
return
temp=eval(name)
temp.captureEvents(Event.MOUSEDOWN | Event.MOUSEUP)
temp.onmousedown=gons
temp.onmousemove=dragns
temp.onmouseup=stopns
}

function gons(e){
temp.captureEvents(Event.MOUSEMOVE)
nsx=e.x
nsy=e.y
}
function dragns(e){
if (dragswitch==1){
temp.moveBy(e.x-nsx,e.y-nsy)
return false
}
}

function stopns(){
temp.releaseEvents(Event.MOUSEMOVE)
}

//drag drop function for ie4+ and NS6////
/////////////////////////////////


function drag_drop(e){
if (ie4&&dragapproved){
crossobj.style.left=tempx+event.clientX-offsetx
crossobj.style.top=tempy+event.clientY-offsety
return false
}
else if (ns6&&dragapproved){
crossobj.style.left=tempx+e.clientX-offsetx+"px"
crossobj.style.top=tempy+e.clientY-offsety+"px"
return false
}
}

function initializedrag(e){
crossobj=ns6? document.getElementById("showimage") : document.all.showimage
var firedobj=ns6? e.target : event.srcElement
var topelement=ns6? "html" : document.compatMode!="BackCompat"? "documentElement" : "body"
while (firedobj.tagName!=topelement.toUpperCase() && firedobj.id!="dragbar"){
firedobj=ns6? firedobj.parentNode : firedobj.parentElement
}

if (firedobj.id=="dragbar"){
offsetx=ie4? event.clientX : e.clientX
offsety=ie4? event.clientY : e.clientY

tempx=parseInt(crossobj.style.left)
tempy=parseInt(crossobj.style.top)

dragapproved=true
document.onmousemove=drag_drop
}
}
document.onmouseup=new Function("dragapproved=false")

////drag drop functions end here//////

function hidebox(){
if (ie4||ns6)
crossobj.style.visibility="hidden"
else if (ns4)
document.showimage.visibility="hide"
}