event.target不工作在Firefox上

问题描述

  var x = event.target || event.srcElement; 
 document.getElementById（x.id）.style.left = 200 +px; 
 document.getElementById（x.id）.style.top = 100 +px; 
  

在Chrome浏览器和IE浏览器上运行良好，但在Firefox上无法运行。尝试在谷歌。谷歌说event.srcElement（工作在IE浏览器，但不是在Firefox），所以我已经添加event.target，但仍然无法正常工作。是否有更多的变化，我需要做的工作在Firefox上？顺便说一句，我使用3.5版本的Firefox。

pre $函数up（）
{
dragok = false ;
document.onmousemove = null;
var x = event.target || event.srcElement;
document.getElementById（x.id）.style.left = 200 +px;
document.getElementById（x.id）.style.top = 100 +px;
}

请帮助我使它在Firefox上工作

解决方案

确保将事件定义为处理程序的形式参数。
$ b

IE 全局定义， Chrome 它可以工作，但是 Firefox 只是将它定义为一个函数参数。

  function up（e）{
 // ^ ----------------------------------- ------------------ + 
 if（！e）e = window.event; //< ---需要这个---和this  - >  -  + 
 
 dragok = false; 
 document.onmousemove = null; 
 var x = e.target || e.srcElement; //< ---和这些
 document.getElementById（x.id）.style.left = 200 +px; 
 document.getElementById（x.id）.style.top = 100 +px; 
} 
  

 var x = event.target||event.srcElement;
 document.getElementById(x.id).style.left =  200 + "px" ;
 document.getElementById(x.id).style.top  =  100 + "px" ;

Works fine on google chrome and IE but not on firefox. Tried it on google. google says event.srcElement(works on IE but not on firefox) so i have added event.target but still not working. Is there anymore changes I need to do to work on firefox? By the way Im using 3.5 version of firefox.

       function up()
           {
                dragok = false;
                document.onmousemove = null;
                var x = event.target||event.srcElement;
                document.getElementById(x.id).style.left= 200 + "px" ;
                document.getElementById(x.id).style.top= 100 + "px" ;
           }

Please help me to make it work on firefox

解决方案

Make sure you define event as a formal parameter to the handler.

IE defines it globally, and Chrome defines it both in both places, so it works either way, but Firefox only defines it as a function parameter.

function up( e ) {
    //       ^-----------------------------------------------------+
    if( !e ) e = window.event; // <---needed this --- and this ->--+

    dragok = false;
    document.onmousemove = null;
    var x = e.target||e.srcElement; // <--- and these
    document.getElementById(x.id).style.left= 200 + "px" ;
    document.getElementById(x.id).style.top= 100 + "px" ;
}

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