var nDots = 5;
//if (document.all&&window.print)
// document.body.style.cssText="overflow-x:hidden;overflow-y:scroll"
var Xpos = 0;
var Ypos = 0;

  // Фиксируется временной промежуток
var DELTAT = .02;
  // Размеры
var SEGLEN = 10;
var SPRINGK = 10;
  // Фиксируются физические константы
 
var MASS = 1;
var GRAVITY = 50;
var RESISTANCE = 10;
  // Условия останова
  
var STOPVEL = 0.1;
var STOPACC = 0.1;
var DOTSIZE = 30;
  // Дополнительные условия

var BOUNCE = 0.75;

var isNetscape = navigator.appName=="Netscape";
var isIE = navigator.appName=="Microsoft Internet Explorer";
  
var followmouse = true;

var dots = new Array();
var dotsX = new Array();
var dotsY = new Array();
var dotsdx = new Array();
var dotsdy = new Array();


window.addEvent('domready', function(){
	// замена шрифтов
	initLapa();
	if (isIE) {
    	document.onmousemove = MoveHandlerIE;
	} else {
		document.addEventListener ("mousemove",getCoord,false);
	}
});



function initLapa()
{
    var i = 0;
    for (i = 0; i < nDots; i++) {
        dotsX[i] = 0;
         dotsY[i] = 0;
         dotsdx[i] = 0;
         dotsdy[i] = 0;
    }
      
    // set their positions
    for (i = 0; i < nDots; i++) {

        document.getElementById("dot"+i).style.left = dotsX[i];
        document.getElementById("dot"+i).style.top = dotsY[i];
    }
    
    
  /*  if (isNetscape) {

        startanimate();
    } else {*/

        setTimeout("startanimate()", 2000);
  //  }
}

function startanimate() {	
    setInterval("animate()", 20);
    
}

function setInitPositions(dots)
{
    // initialize dot positions to be on top 
    // of the bullets in the <ul>
    var startloc = document.all.tags("LI");
    var i = 0;
    for (i = 0; i < startloc.length && i < (nDots - 1); i++) {
        dotsX[i+1] = startloc[i].offsetLeft
            startloc[i].offsetParent.offsetLeft - DOTSIZE;
        dotsY[i+1] = startloc[i].offsetTop +
            startloc[i].offsetParent.offsetTop + 2*DOTSIZE;
    }
    // put 0th dot above 1st (it is hidden)
    dotsX[0] = dotsX[1];
    
    
    dotsY[0] = dotsY[1] - SEGLEN;
}

// just save mouse position for animate() to use
function MoveHandler(e)
{
	// document.captureEvents(Event.MOUSEMOVE);
    Xpos = event.pageX;
    Ypos = event.pageY;
         
        
    return true;
}

// just save mouse position for animate() to use
function MoveHandlerIE() {
    Xpos = window.event.x + document.body.scrollLeft;
    Ypos = window.event.y + document.body.scrollTop;	

}


/* if (isNetscape) {
    document.captureEvents(Event.MOUSEMOVE);
    document.onMouseMove = MoveHandler;
} else {*/

//}
    
function getCoord( event ) {
	 
	 Xpos = event.pageX;
     Ypos = event.pageY; 
      
}

function vec(X, Y)
{
    this.X = X;
    this.Y = Y;
}

// adds force in X and Y to spring for dot[i] on dot[j]
function springForce(i, j, spring)
{
    var dx = (dotsX[i] - dotsX[j]);
    var dy = (dotsY[i] - dotsY[j]);
    var len = Math.sqrt(dx*dx + dy*dy);
    if (len > SEGLEN) {
        var springF = SPRINGK * (len - SEGLEN);
        spring.X += (dx / len) * springF;
        spring.Y += (dy / len) * springF;
    }
}


function animate() {	
    // dots[0] follows the mouse,
    // though no dot is drawn there
    var start = 0;
    if (followmouse) {
        dotsX[0] = Xpos;
        dotsY[0] = Ypos;	
        start = 1;
    }
    
    for (i = start ; i < nDots; i++ ) {
        
        var spring = new vec(0, 0);
        if (i > 0) {
            springForce(i-1, i, spring);
        }
        if (i < (nDots - 1)) {
            springForce(i+1, i, spring);
        }
        
        // air resisitance/friction
        var resist = new vec(-dotsdx[i] * RESISTANCE,
            -dotsdy[i] * RESISTANCE);
        
        // compute new accel, including gravity
        var accel = new vec((spring.X + resist.X)/ MASS,
            (spring.Y + resist.Y)/ MASS + GRAVITY);
        
        // compute new velocity
        dotsdx[i] += (DELTAT * accel.X);
        dotsdy[i] += (DELTAT * accel.Y);
        
        // stop dead so it doesn't jitter when nearly still
        if (Math.abs(dotsdx[i]) < STOPVEL &&
            Math.abs(dotsdy[i]) < STOPVEL &&
            Math.abs(accel.X) < STOPACC &&
            Math.abs(accel.Y) < STOPACC) {
            dotsdx[i] = 0;
            dotsdy[i] = 0;
        }
        
        // move to new position
        dotsX[i] += dotsdx[i];
        dotsY[i] += dotsdy[i];
        
        // get size of window
        var height, width;

        
        // bounce of 3 walls (leave ceiling open)
        if (dotsY[i] >=  height - DOTSIZE - 1) {
            if (dotsdy[i] > 0) {
                dotsdy[i] = BOUNCE * -dotsdy[i];
            }
            dotsY[i] = height - DOTSIZE - 1;
        }
        if (dotsX[i] >= width - DOTSIZE) {
            if (dotsdx[i] > 0) {
                dotsdx[i] = BOUNCE * -dotsdx[i];
            }
            dotsX[i] = width - DOTSIZE - 1;
        }
        if (dotsX[i] < 0) {
            if (dotsdx[i] < 0) {
                dotsdx[i] = BOUNCE * -dotsdx[i];
            }
            dotsX[i] = 0;
        }
        
        // move img to new position
        possx = dotsX[i] - 15;
        possy = dotsY[i];
        
        if (xscr-100 < possx)  possx = xscr-100;

/*        
if (document.implementation && document.implementation.createDocument){

if (yscr+ scrOfY -35 < possy)  possy = scrOfY + yscr -35;



} else {
        if (yscr-35 < possy)  possy = yscr-35;
}

*/
getScrollXY();
 if (isNetscape) {if (yscr+ scrOfY -35 < possy)  possy = scrOfY + yscr -35; }
        document.getElementById("dot"+i).style.left = possx + 'px';
    if (document.implementation && document.implementation.createDocument){    
        document.getElementById("dot"+i).style.top = possy + 'px';	}
        else {document.getElementById("dot"+i).style.top = possy + scrOfY + 'px';}
        
        
    }
}


//window.onresize = dblock;
//window.onscroll = getScrollXY;
//dblock();
//getScrollXY();

var xscr, yscr;
var scrOfX = 0, scrOfY = 0, ddd=5;
function dblock() {


getScrollXY();


if (self.innerHeight) {
    xscr = self.innerWidth;
    yscr = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) {
    xscr = document.documentElement.clientWidth;
    yscr = document.documentElement.clientHeight;
	} else if (document.body) {
	    xscr = document.body.clientWidth;
	    yscr = document.body.clientHeight;
	}
}

function getScrollXY() {
if (document.documentElement && document.documentElement.clientHeight) {	
  if( typeof( window.pageYOffset ) == 'number') {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
   
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
   scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
     scrOfY = document.documentElement.scrollTop;
     scrOfX = document.documentElement.scrollLeft;
  } 
	return [ scrOfX, scrOfY ]; 
}
}