//  ALTTXT V1.2
//  BY: BRIAN GOSSELIN OF SCRIPTASYLUM.COM
//  ADDED FADING EFFECT FOR IE4+ AND NS6+ ONLY AND OPTIMIZED THE CODE A BIT.
//  SCRIPT FEATURED ON DYNAMIC DRIVE (http://www.dynamicdrive.com) 


var center=false;     
// CENTERS THE BOX UNER THE MOUSE, OTHERWISE DISPLAYS BOX TO THE RIGHT OF THE MOUSE
var centertext=false; 
// CENTERS THE TEXT INSIDE THE BOX. YOU CAN'T SIMPLY DO THIS VIA STYLE BECAUSE OF NS4.
// OTHERWISE, TEXT IS LEFT-JUSTIFIED. 

// NO NEED TO EDIT BEYOND THIS POINT 

var NS4 = (navigator.appName.indexOf("Netscape")>=0 && !document.getElementById)? true : false;
var IE4 = (document.all && !document.getElementById)? true : false;
var IE5 = (document.getElementById && document.all)? true : false;
var NS6 = (document.getElementById && navigator.appName.indexOf("Netscape")>=0 )? true: false;
var W3C = (document.getElementById)? true : false;
var w_y, w_x, navtxt, boxheight, boxwidth;
var ishover=false;
var isloaded=false;
var ieop=0;
var op_id=0;

function getwindowdims(){
  w_y=(NS4||NS6)? window.innerHeight : (IE5||IE4)? document.body.clientHeight : 0;
  w_x=(NS4||NS6)? window.innerWidth : (IE5||IE4)? document.body.clientWidth : 0;
}

function getboxwidth(){
  if(NS4)boxwidth=(navtxt.document.width)? navtxt.document.width : navtxt.clip.width;
  if(IE5||IE4)boxwidth=(navtxt.style.pixelWidth)? navtxt.style.pixelWidth : navtxt.offsetWidth;
  if(NS6)boxwidth=(navtxt.style.width)? parseInt(navtxt.style.width) : parseInt(navtxt.offsetWidth);
}

function getboxheight(){
  if(NS4)boxheight=(navtxt.document.height)? navtxt.document.height : navtxt.clip.height;
  if(IE4||IE5)boxheight=(navtxt.style.pixelHeight)? navtxt.style.pixelHeight : navtxt.offsetHeight;
  if(NS6)boxheight=parseInt(navtxt.offsetHeight);
}

function movenavtxt(x,y){
  if(NS4)navtxt.moveTo(x,y);
  if(W3C||IE4){
    navtxt.style.left=x+'px';
    navtxt.style.top=y+'px';
  }
}

function getpagescrolly(){
  if(NS4||NS6)return window.pageYOffset;
  if(IE5||IE4)return document.body.scrollTop;
}

function getpagescrollx(){
  if(NS4||NS6)return window.pageXOffset;
  if(IE5||IE4)return document.body.scrollLeft;
}

function writeindiv(text){
  if(NS4){
    navtxt.document.open();
    navtxt.document.write(text);
    navtxt.document.close();
  }
if(W3C||IE4)navtxt.innerHTML=text;
}

//**** END UTILITY FUNCTIONS ****//

function writetxt(text){
  if(isloaded){
    if(text!=0){
      ishover=true;
      if(NS4)text='<div class="navtext">'+text+'</div>';
      writeindiv(text);
      getboxheight();
    }
    else{
      if(NS4)navtxt.visibility="hide";
      if(IE4||W3C)navtxt.style.visibility="hidden";
      writeindiv('');
      ishover=false;
    }
  }
}

function moveobj(evt){
  if(isloaded && ishover){
    margin=(IE4||IE5)? 1 : 23;
    if(NS6)if(document.height+27-window.innerHeight<0)margin=15;
    if(NS4)if(document.height-window.innerHeight<0)margin=10;
    if (NS4){
      mx=evt.pageX
      my=evt.pageY
    }
    else if (NS6){
      mx=evt.clientX
      my=evt.clientY
    }
    else if (IE5){
      mx=event.clientX
      my=event.clientY
    }
    else if (IE4){
      mx=0
      my=0
    }
    if(NS4){
      mx-=getpagescrollx();
      my-=getpagescrolly();
    }
    xoff=(center)? mx-boxwidth/2 : mx+5;
    //yoff=(my+boxheight+30-getpagescrolly()+margin>=w_y)? -15-boxheight: 30;
    yoff=my-boxheight+30-getpagescrolly()+margin>=0? -15-boxheight: 30;
    //movenavtxt( Math.min(w_x-boxwidth-margin , Math.max(2,xoff))+getpagescrollx() , my+yoff+getpagescrolly());
    movenavtxt( Math.min(w_x-boxwidth-margin , Math.max(2,xoff))+getpagescrollx() , my+yoff+getpagescrolly());
    //movenavtxt( mx , my);
    if(NS4)navtxt.visibility="show";
    if(W3C||IE4)navtxt.style.visibility="visible";
  }
}

if(NS4)document.captureEvents(Event.MOUSEMOVE);
document.onmousemove=moveobj;

window.onload=function(){
    navtxt=(NS4)? document.layers['navtxt'] : (IE4)? document.all['navtxt'] : (W3C)? document.getElementById('navtxt') : null;
    getboxwidth();
    getboxheight();
    getwindowdims();
    isloaded=true;
    if(W3C)navtxt.style.padding='4px';
}
window.onresize=getwindowdims;