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/**
 * Mm Javascript code
 * 未完待续...
 *
 * @author: Guya
 * @email: camworkster@gmail.com
 * @version: 1.0 beta
 */
 
//使用对象
var MmJs = {
version: '1.0 beta',
author: 'Guya'
};
 
/**
 * 浏览器判断. COPY jQuery
 *
 */
var userAgent = navigator.userAgent.toLowerCase();
MmJs.browser = {
	version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
	safari: /webkit/.test( userAgent ),
	opera: /opera/.test( userAgent ),
	msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
	mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
};
 
/**
 * 加入 window.onload 执行函数.
 */
MmJs.addOnload = function(fnHandler) {
    var oldOnload = window.onload;
	if( typeof window.onload != 'function' ) {
		window.onload = fnHandler;
	} else {
		window.onload = function() {
			oldOnload();
			fnHandler();
		}
	}
};
 
/**
 * 加入 window.onunload 执行函数.
 */
MmJs.addOnUnload = function(fnHandler) {
    var oldOnUnload = window.onunload;
	if( typeof window.onunload != 'function' ) {
		window.onunload = fnHandler;
	} else {
		window.onunload = function() {
			oldOnUnload();
			fnHandler();
		}
	}
};
 
/**
 * 增加 DOM 事件监听.
 */
MmJs.addEventHandler = function (oTarget, sEventType, fnHandler) {
 
    if (oTarget.addEventListener) {
 
        oTarget.addEventListener(sEventType, fnHandler, false);
 
    } else if (oTarget.attachEvent) {
 
        oTarget.attachEvent("on" + sEventType, fnHandler);
 
    } else {
 
        oTarget["on" + sEventType] = fnHandler;
 
    }
 
};
 
/**
 * 删除 DOM 事件监听.
 */     
 
MmJs.removeEventHandler = function (oTarget, sEventType, fnHandler) {
 
    if (oTarget.removeEventListener) {
 
        oTarget.removeEventListener(sEventType, fnHandler, false);
 
    } else if (oTarget.detachEvent) {
 
        oTarget.detachEvent("on" + sEventType, fnHandler);
 
    } else { 
 
        oTarget["on" + sEventType] = null;
 
    }
 
};
 
MmJs.formatEvent = function (oEvent) {
 
    if (MmJs.browser.msie) {
 
        oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;
 
        oEvent.eventPhase = 2;
 
        oEvent.isChar = (oEvent.charCode > 0);
 
        oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
 
        oEvent.pageY = oEvent.clientY + document.body.scrollTop;
 
        oEvent.preventDefault = function () {
 
            this.returnValue = false;
 
        };
 
        if (oEvent.type == "mouseout") {
 
            oEvent.relatedTarget = oEvent.toElement;
 
        } else if (oEvent.type == "mouseover") {
 
            oEvent.relatedTarget = oEvent.fromElement;
 
        }
 
        oEvent.stopPropagation = function () {
 
            this.cancelBubble = true;
 
        };
 
        oEvent.target = oEvent.srcElement;
 
        oEvent.time = (new Date).getTime();
 
    }
 
    return oEvent;
 
};
 
/**
 * 获取事件.
 */
MmJs.getEvent = function() {
 
    if (window.event) {
 
        return this.formatEvent(window.event);
 
    } else {
 
        return MmJs.getEvent.caller.arguments[0];
 
    }
 
};
 
/**
 * 依据ID属性查找DOM节点
 */
MmJs.getById = function(dom_id_string) {
    if(!dom_id_string) { return null; };
    if(document.getElementById) {
        return document.getElementById(dom_id_string);
    };
    return null;
};
 
/**
 * 创建DOM节点.
 */
MmJs.createElement = function(tag_type, attr, append_to_element) {
    if('string' != typeof tag_type) {
        tag_type = 'div';
    };
    if('object' != typeof append_to_element) {
        append_to_element = document.body;
    };
    var d = document.createElement(tag_type);
    append_to_element.appendChild(d);
    if('object' == typeof attr) {
        if('object' == typeof attr.dom) {
            for(var i in attr.dom) {
                d.setAttribute(i,attr.dom[i]);
            };
        };
        if('object' == typeof attr.style) {
            for(var i in attr.style) {
                d.style.i = attr.style[i];
            };
        };
        if('object' == typeof attr.event) {
            for(var i in attr.event) {
                if('function' == typeof attr.event[i]) {
                    this.addEventHandler(d, i, attr.event[i]);
                };
            };
        };
    };
};
 
/**
 * 获取DOM元素位置
 */
MmJs.getPos = function(elObj, posName) {
    if('string' == typeof elObj) {
        elObj = this.getById(elObj);
    }
    var iPos = 0;
	while(elObj != null) {
		iPos += elObj["offset" + posName];
		elObj = elObj.offsetParent;
	}
	return iPos;
};

/** 
 * 这个函数可以代替window.onload = function() {} 
 * 可以不受 window.onload 只能在一处使用的限制 
 * 但在别处使用这个函数，这个js要先加载 
 * 
 * @author: Cai.Aimin 
 * @email: cam_work@163.com 
 * @since: 2008-03-04 
 * @return void 
 */ 
function addLoadEvent(func) { 
        var oldOnload = window.onload; 
        if( typeof window.onload != 'function' ) { 
               window.onload = func; 
        } else { 
               window.onload = function() { 
                        oldOnload(); 
                        func(); 
                } 
        } 
}