function getWindowSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  return {
    width:myWidth,
    height:myHeight
  };
}

function getScrollY() {
  var scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
  }
  return scrOfY;
}


function getMousePosition(event) {
    if (event.pageX == null) {
        // IE case
        var d = (document.documentElement && document.documentElement.scrollLeft != null) ? document.documentElement : document.body;
        docX = event.clientX + d.scrollLeft;
        docY = event.clientY + d.scrollTop;
    } else {
        // all other browsers
        docX = event.pageX;
        docY = event.pageY;
    }
    return {
        left:docX,
        top:docY
    };
}

function getPosition(obj){
    var topValue = 0, leftValue = 0;
    while(obj) {
        leftValue += obj.offsetLeft;
        topValue += obj.offsetTop;
        obj = obj.offsetParent;
    }
    return {
        left:leftValue,
        top:topValue
    };
}