/*左導航固定效果*/
			(function()
			{
				function addCss(cssCode)
				{
					var styleElement = document.createElement("style");
					styleElement.type = "text/css";
					if(styleElement.styleSheet)
					{
						styleElement.styleSheet.cssText = cssCode;
					}
					else
					{
						styleElement.appendChild(document.createTextNode(cssCode));
					}
					document.getElementsByTagName("head")[0].appendChild(styleElement);
				}

				var ua = navigator.userAgent;
				m=ua.match(/MSIE\s([^;]*)/);
				var iVer = 0;
				if(m && m[1]) 
				{
					iVer = parseInt(m[1]);
				}

				if(iVer != 0 && iVer <= 6)
				{
					var strCss = "* html #content_left{position:absolute; top:expression(ignore = ((document.documentElement.scrollTop>document.getElementById('content').offsetTop) ? document.documentElement.scrollTop : document.getElementById('content').offsetTop) + 'px');}";
					addCss(strCss);
				}
				else
				{
					function getAbsoluteOffsetTop(obj) 
					{
						var y = obj.offsetTop;
						while (obj = obj.offsetParent) y += obj.offsetTop;
						return y;
					}
					function getAbsoluteOffsetLeft(obj) 
					{
						var y = obj.offsetLeft;
						while (obj = obj.offsetParent) y += obj.offsetLeft;
						return y;
					}


					function f()
					{
						var container = document.getElementById("content");
						var obj = document.getElementById("content_left");
						var top = document.documentElement.scrollTop;
						var left = document.documentElement.scrollLeft;
						var h = getAbsoluteOffsetTop(container);
						var w = getAbsoluteOffsetLeft(container);
						if(top < h)
						{
							obj.style.top = h + "px";
							obj.style.left = w - left + "px";
							obj.style.position = "absolute";
						}
						else
						{
							obj.style.top = "0px";
							obj.style.left = w - left + "px";
							obj.style.position = "fixed";
						}
					}
					f();
					window.onscroll = f;
					window.onresize = f;
				}

			})();