###解决浏览器兼容问题 ####获取事件对象兼容

      oBtn.onclick=function(eve){
        var e = eve ||window.event
        }

####获取事件目标兼容

      oBtn.onclick=function(eve){
        var e = eve ||window.evente.target
        var target =e.target ||window.event
    }

####阻止冒泡兼容

    function stopBubble(e){
        if(e.stopPropgation){
            e.stopPropgation();
        }else{
            e.cancelBubble=true;
        }
    }

####阻止系统自带功能

   function preDef(e){
        if(e.preventDefault){
            e.preventDefault();
        }else{
            e.returnValue==false;
        }
    }

####键码兼容

 var which = e.keyCode || e.which;

###字符码兼容

var which = e.charCode || e.which;