(function($) {
	$.extend({
		/**
		 * 取得页面的长宽
		 */
		getPageSize: function() {
			var xScroll, yScroll;
			
			if (window.innerHeight && window.scrollMaxY) {	
				xScroll = window.innerWidth + window.scrollMaxX;
				yScroll = window.innerHeight + window.scrollMaxY;
			} else if (document.body.scrollHeight > document.body.offsetHeight) {
				xScroll = document.body.scrollWidth;
				yScroll = document.body.scrollHeight;
			} else {
				xScroll = document.body.offsetWidth;
				yScroll = document.body.offsetHeight;
			}
			
			var windowWidth, windowHeight;
			
			if (self.innerHeight) {
				if(document.documentElement.clientWidth){
					windowWidth = document.documentElement.clientWidth; 
				} else {
					windowWidth = self.innerWidth;
				}
				windowHeight = self.innerHeight;
			} else if (document.documentElement && document.documentElement.clientHeight) {
				windowWidth = document.documentElement.clientWidth;
				windowHeight = document.documentElement.clientHeight;
			} else if (document.body) {
				windowWidth = document.body.clientWidth;
				windowHeight = document.body.clientHeight;
			}
			
			if(yScroll < windowHeight){
				pageHeight = windowHeight;
			} else { 
				pageHeight = yScroll;
			}
			
			if(xScroll < windowWidth){	
				pageWidth = xScroll;		
			} else {
				pageWidth = windowWidth;
			}
		
			arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
			return arrayPageSize;
		},
		
		/**
		 * 取得页面的偏移量
		 */
		getPageScroll: function() {
			
			var xScroll, yScroll;
		
			if (self.pageYOffset) {
				yScroll = self.pageYOffset;
				xScroll = self.pageXOffset;
			} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
				yScroll = document.documentElement.scrollTop;
				xScroll = document.documentElement.scrollLeft;
			} else if (document.body) {// all other Explorers
				yScroll = document.body.scrollTop;
				xScroll = document.body.scrollLeft;	
			}
		
			arrayPageScroll = new Array(xScroll,yScroll) 
			return arrayPageScroll;
		},
		
		/**
		 * 生成COOKIE
		 */
		responseCookies: function(cookieName, cookieValue, expires) {
			var lowerCookieName = cookieName.toLowerCase();
			var cookieStr = document.cookie;
			
			if (cookieStr != "") {
				var cookieArr = cookieStr.split("; ");
				var pos = -1;
				for (var i = 0; i < cookieArr.length; i++) {
					pos = cookieArr[i].indexOf("=");
					if (pos > 0) {
						if (cookieArr[i].substring(0, pos).toLowerCase() == lowerCookieName) {
							cookieName = cookieArr[i].substring(0, pos);
							break;
						}
					}
				}
			}
			
			if (expires) {
				document.cookie = cookieName + "=" + escape(cookieValue) + "; expires=" + expires.toGMTString();
			} else {
				document.cookie = cookieName + "=" + escape(cookieValue);
			}
		},
		
		/**
		 * 取得COOKIE
		 */
		requestCookies: function(cookieName, dfltValue) {
			var lowerCookieName = cookieName.toLowerCase();
			var cookieStr = document.cookie;    
			if (cookieStr == "") {
				return dfltValue;
			}
			
			var cookieArr = cookieStr.split("; ");
			var pos = -1;
			for (var i=0; i<cookieArr.length; i++)
			{
				pos = cookieArr[i].indexOf("=");
				if (pos > 0)
				{
					if (cookieArr[i].substring(0, pos).toLowerCase() == lowerCookieName)
					{
						return unescape(cookieArr[i].substring(pos+1, cookieArr[i].length));
					}
				}
			}
			
			return dfltValue;
		}
	});
})(jQuery);