rem: if(typeof window.pageXOffset=="number") return window.pageXOffset; if(document.documentElement.scrollLeft) return Math.max(document.documentElement.scrollLeft,document.body.scrollLeft); else if(document.body.scrollLeft!=null) return document.body.scrollLeft; return 0; 
add: if(typeof window.pageXOffset=="number") return window.pageXOffset; if(document.documentElement.scrollLeft) return Math.max(document.documentElement.scrollLeft,document.body.scrollLeft); else if(document.body.scrollLeft!=null) return document.body.scrollLeft; return 0; 
context: function getScrollLeft(){if(typeof window.pageXOffset=="number")return window.pageXOffset;if(document.documentElement.scrollLeft)return Math.max(document.documentElement.scrollLeft,document.body.scrollLeft);else if(document.body.scrollLeft!=null)return document.body.scrollLeft;return 0;}
meta: 1064	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1064/4880f3147da22d14ddf434b5fe14f30342a93ec6/viewport.js/clean/lib/tabs/viewport.js