/*************************************************************************
 dw_viewport.js 
 free code from dyn-web.com
 version date: mar 2008
*************************************************************************/ 
 
var dw_Viewport = {
  getWinWidth: function () {
    this.width = 0;
    if (window.innerWidth) 
      this.width = window.innerWidth - 18;
    else if (document.documentElement && document.documentElement.clientWidth) 
      this.width = document.documentElement.clientWidth;
    else if (document.body && document.body.clientWidth) 
      this.width = document.body.clientWidth;
    return this.width;
  },
 
  getWinHeight: function () {
    this.height = 0;
    if (window.innerHeight) 
      this.height = window.innerHeight - 18;
    else if (document.documentElement && document.documentElement.clientHeight) 
      this.height = document.documentElement.clientHeight;
    else if (document.body && document.body.clientHeight) 
      this.height = document.body.clientHeight;
    return this.height;
  },
 
  getScrollX: function () {
    this.scrollX = 0;
    if (typeof window.pageXOffset == "number") 
      this.scrollX = window.pageXOffset;
    else if (document.documentElement && document.documentElement.scrollLeft)
      this.scrollX = document.documentElement.scrollLeft;
    else if (document.body && document.body.scrollLeft) 
      this.scrollX = document.body.scrollLeft; 
    else if (window.scrollX) 
      this.scrollX = window.scrollX;
    return this.scrollX;
  },
  
  getScrollY: function () {
    this.scrollY = 0;  
    if (typeof window.pageYOffset == "number") 
      this.scrollY = window.pageYOffset;
    else if (document.documentElement && document.documentElement.scrollTop)
      this.scrollY = document.documentElement.scrollTop;
    else if (document.body && document.body.scrollTop) 
      this.scrollY = document.body.scrollTop; 
    else if (window.scrollY) 
      this.scrollY = window.scrollY;
    return this.scrollY;
  },
  
  getAll: function () {
    this.getWinWidth(); this.getWinHeight();
    this.getScrollX(); this.getScrollY();
  }
 
}