var sina = {
	$ : function(objName){if(document.getElementById){return eval('document.getElementById("'+objName+'")')}else{return eval('document.all.'+objName)}},
	isIE : navigator.appVersion.indexOf("MSIE")!=-1?true:false,
	
	//Event
	addEvent : function(obj,eventType,func){if(obj.attachEvent){obj.attachEvent("on" + eventType,func);}else{obj.addEventListener(eventType,func,false)}},
	delEvent : function(obj,eventType,func){
		if(obj.detachEvent){obj.detachEvent("on" + eventType,func)}else{obj.removeEventListener(eventType,func,false)}
	},
	//Cookie
	readCookie : function(l){var i="",I=l+"=";if(document.cookie.length>0){var offset=document.cookie.indexOf(I);if(offset!=-1){offset+=I.length;var end=document.cookie.indexOf(";",offset);if(end==-1)end=document.cookie.length;i=unescape(document.cookie.substring(offset,end))}};return i},
	
	writeCookie : function(O,o,l,I){var i="",c="";if(l!=null){i=new Date((new Date).getTime()+l*3600000);i="; expires="+i.toGMTString()};if(I!=null){c=";domain="+I};document.cookie=O+"="+escape(o)+i+c},
	//Style
	readStyle:function(i,I){if(i.style[I]){return i.style[I]}else if(i.currentStyle){return i.currentStyle[I]}else if(document.defaultView&&document.defaultView.getComputedStyle){var l=document.defaultView.getComputedStyle(i,null);return l.getPropertyValue(I)}else{return null}}
};