var EventUtil = {
    /* 添加时间处理程序 */
    addHandler : function(element,type,handler){
        if(element.addEventListener){
            element.addEventListener(type,handler,false);
        }else if(element.attachEvent){
            element.attachEvent("on"+type,handler);
        }else{
            element["on"+type] = handler;
        }
    },
    /* 获取event对象的引用 */
    getEvent: function(event){
        return event? event : window.event;
    },
    /* 获取事件的目标 */
    getTarget:function(event){
        return event.target || event.srcElement;
    },
    /* 取消事件的默认函数 */
    preventDefault:function(event){
        if(event.preventDefault){
            event.preventDefault();
        }else{
            event.returnValue = false;
        }
    },
    /* 移除时间处理程序 */
    removeHandler : function(){
        if(element.removeEventListener){
            element.removeEventListener(type,handler,false);
        }else if(element.detachEvent){
            element.detachEvent("on"+type,handler);
        }else{
            element["on"+type] = null;
        }
    },
    /* 阻止事件流继续传播 */
    stopPropagation : function(event){
        if(event.stopPropagation){
            event.stopPropagation();
        }else{
            event.cancelBubble = true;
        }
    },
    /* 获取相关元素 */
    getRelatedTarget : function(event){
        if(event.relatedTarget){
            return event.relatedTarget;
        }else if(event.toElement){
            return event.toElement;
        }else if(event.fromElement){
            return event.fromElement;
        }else{
            return null;
        }
    },
    /*获取按键编码*/
    getCharCode : function(event){
        return (typeof event.charCode == "number")?event.charCode:event.keyCode;
    },
    //获取剪切板数据  
    getClipboardText:function(event){
        var clipboardData = window.clipboardData || event.clipboardData;
        return clipboardData.getData("text");
    },
    
    //日期不能超过当前日期
    dateLimit:function(selectedDate) {
    	//日期不能超过当天日期
    	var myDate = new Date();
    	var str = selectedDate.split("-");
    	var yDate = new Date(parseInt(str[0]), parseInt(str[1]) - 1, parseInt(str[2]));
    	if (yDate <= myDate) {
    		return true;
    	} else {
    		return false;
    	}
    }
};