function menuFix() {
 var sfEls = document.getElementById("nav").getElementsByTagName("li");
 for (var i=0; i<sfEls.length; i++) {
  sfEls[i].onmouseover=function() {
  this.className+=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onMouseDown=function() {
  this.className+=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onMouseUp=function() {
  this.className+=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onmouseout=function() {
  this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),"");
  }
 }
}
window.onload=menuFix;
var BROWSER = {};
var USERAGENT = navigator.userAgent.toLowerCase();
browserVersion({'ie':'msie','firefox':'','chrome':'','opera':'','safari':'','mozilla':'','webkit':'','maxthon':'','qq':'qqbrowser'});
if(BROWSER.safari) {
	BROWSER.firefox = true;
}
BROWSER.opera = BROWSER.opera ? opera.version() : 0;

HTMLNODE = document.getElementsByTagName('head')[0].parentNode;
if(BROWSER.ie) {
	BROWSER.iemode = parseInt(typeof document.documentMode != 'undefined' ? document.documentMode : BROWSER.ie);
	HTMLNODE.className = 'ie_all ie' + BROWSER.iemode;
}

function $g(id) {
	return !id ? null : document.getElementById(id);
}


function _attachEvent(obj, evt, func, eventobj) {
	eventobj = !eventobj ? obj : eventobj;
	if(obj.addEventListener) {
		obj.addEventListener(evt, func, false);
	} else if(eventobj.attachEvent) {
		obj.attachEvent('on' + evt, func);
	}
}

function browserVersion(types) {
	var other = 1;
	for(i in types) {
		var v = types[i] ? types[i] : i;
		if(USERAGENT.indexOf(v) != -1) {
			var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');
			var matches = re.exec(USERAGENT);
			var ver = matches != null ? matches[2] : 0;
			other = ver !== 0 && v != 'mozilla' ? 0 : other;
		}else {
			var ver = 0;
		}
		eval('BROWSER.' + i + '= ver');
	}
	BROWSER.other = other;
}

function fetchOffset(obj, mode) {
	var left_offset = 0, top_offset = 0, mode = !mode ? 0 : mode;

	if(obj.getBoundingClientRect && !mode) {
		var rect = obj.getBoundingClientRect();
		var scrollTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
		var scrollLeft = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);
		if(document.documentElement.dir == 'rtl') {
			scrollLeft = scrollLeft + document.documentElement.clientWidth - document.documentElement.scrollWidth;
		}
		left_offset = rect.left + scrollLeft - document.documentElement.clientLeft;
		top_offset = rect.top + scrollTop - document.documentElement.clientTop;
	}
	if(left_offset <= 0 || top_offset <= 0) {
		left_offset = obj.offsetLeft;
		top_offset = obj.offsetTop;
		while((obj = obj.offsetParent) != null) {
			position = getCurrentStyle(obj, 'position', 'position');
			if(position == 'relative') {
				continue;
			}
			left_offset += obj.offsetLeft;
			top_offset += obj.offsetTop;
		}
	}
	return {'left' : left_offset, 'top' : top_offset};
}

function showTopLink() {
	if($g('ft')){
		var viewPortHeight = parseInt(document.documentElement.clientHeight);
		var scrollHeight = parseInt(document.body.getBoundingClientRect().top);
		var basew = parseInt($g('ft').clientWidth);
		var sw = $g('scrolltop').clientWidth;
		if (basew < 1000) {
			var left = parseInt(fetchOffset($g('ft'))['left']);
			left = left < sw ? left * 2 - sw : left;
			$g('scrolltop').style.left = ( basew + left ) + 'px';
		}
		 else {
			$g('scrolltop').style.left = 'auto';
			$g('scrolltop').style.right = 0;
		}

		if (BROWSER.ie && BROWSER.ie < 7) {
			$g('scrolltop').style.top = viewPortHeight - scrollHeight - 180 + 'px';
		}
		if (scrollHeight < -140) {
			$g('scrolltop').style.visibility = 'visible';
		} else {
			$g('scrolltop').style.visibility = 'hidden';
		}
	}
}