var xPos = 300;
var yPos = 200; 
var step = 1;
var delay = 30; 
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
//document.getElementById("img1").style.top = yPos;
function changePos() {
    width = $(window).width();
    height = $(window).height();
    Hoffset = img1.offsetHeight;
    Woffset = img1.offsetWidth;
    $e("img1").style.left = xPos + document.documentElement.scrollLeft;
    $e("img1").style.top = yPos + document.documentElement.scrollTop;
    if (yon)
    { yPos = yPos + step; }
    else
    { yPos = yPos - step; }
    if (yPos < 0)
    { yon = 1; yPos = 0; }
    if (yPos >= (height - Hoffset))
    { yon = 0; yPos = (height - Hoffset); }
    if (xon)
    { xPos = xPos + step; }
    else
    { xPos = xPos - step; }
    if (xPos < 0)
    { xon = 1; xPos = 0; }
    if (xPos >= (width - Woffset))
    { xon = 0; xPos = (width - Woffset); }
}
function start1() {
    $e("img1").visibility = "visible";
    interval = setInterval('changePos()', delay);
}
function pause_resume() {
    if (pause) {
        clearInterval(interval);
        pause = false;
    }
    else {
        interval = setInterval('changePos()', delay);
        pause = true;
    }
}

var xPos2 = 400;
var yPos2 = 300;
var step2 = 1;
var delay2 = 35;
var height2 = 0;
var Hoffset2 = 0;
var Woffset2 = 0;
var yon2 = 0;
var xon2 = 0;
var pause2 = true;
var interval2;
//$e("img2").style.top = yPos2;
function changePos2() {
    width2 = $(window).width();
    height2 = $(window).height();
    Hoffset2 = img2.offsetHeight;
    Woffset2 = img2.offsetWidth;
    $e("img2").style.left = xPos2 + document.documentElement.scrollLeft;
    $e("img2").style.top = yPos2 + document.documentElement.scrollTop;
    if (yon2)
    { yPos2 = yPos2 + step2; }
    else
    { yPos2 = yPos2 - step2; }
    if (yPos2 < 0)
    { yon2 = 1; yPos2 = 0; }
    if (yPos2 >= (height2 - Hoffset2))
    { yon2 = 0; yPos2 = (height2 - Hoffset2); }
    if (xon2)
    { xPos2 = xPos2 + step2; }
    else
    { xPos2 = xPos2 - step2; }
    if (xPos2 < 0)
    { xon2 = 1; xPos2 = 0; }
    if (xPos2 >= (width2 - Woffset2))
    { xon2 = 0; xPos2 = (width2 - Woffset2); }
}
function start2() {
    $e("img2").visibility = "visible";
    interval2 = setInterval('changePos2()', delay2);
}
function pause_resume2() {
    if (pause2) {
        clearInterval(interval2);
        pause2 = false;
    }
    else {
        interval2 = setInterval('changePos2()', delay2);
        pause2 = true;
    }
}
//start();