/*************************************************************************
      dw_viewport.js
      version date Nov 2003
      
      This code is from Dynamic Web Coding 
      at http://www.dyn-web.com/
      Copyright 2003 by Sharon Paine 
      See Terms of Use at http://www.dyn-web.com/bus/terms.html
      Permission granted to use this code 
      as long as this entire notice is included.
    *************************************************************************/  
      
    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;
      },
      
      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;
      },
      
      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;
      },
      
      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;
      },
      
      getAll: function () {
        this.getWinWidth(); this.getWinHeight();
        this.getScrollX();  this.getScrollY();
      }
      
    }