鼠标悬停/鼠标悬停时未定义jQuery事件

问题描述：

我有一个可以在jQuery 1.3.2上正常运行的函数，但是现在我试图在1.4.2上运行它，但出现以下错误未定义事件". 这是简化的代码:

hi i have a function that worked fine using jQuery 1.3.2 but now i am trying to run it with 1.4.2 and i get the following error "event is not defined". here is the code simplified:

<div id="mapcontainer><img href="" usemap="#rage_image_map">
    <div id="mytext"></div>
</div>
<map name="rage_image_map">
    <area shape="poly" href="asthma-data/county-asthma-profiles/del-norte-county-asthma-profile" coords="12,7,10,12" alt="Del Norte County">
    <area shape="poly" href="asthma-data/county-asthma-profiles/siskyou-county-asthma-profile" coords="42,3,42,6,40,8,36,11" alt="Siskyou County">
</map>

这是函数:

$(function () {
    $('area').bind('mouseover mouseleave', function () {
        var mytext = $('#mytext');
        if (event.type == "mouseover") {
            var countyname = $(this).attr("alt");
            mytext.html(countyname);
            mytext.addClass('textcontainer');
        } else {
            mytext.text('');
            mytext.removeClass('textcontainer');
        }
    })
});

该类使div mytext可见，并在其周围放一行，显示要滚动的县名.

the class makes the div mytext visible and puts a line around it, displaying the county name being rolled over.

firebug中的错误中断位于定义mytext变量的行上.但我怀疑问题在于以下语法问题:if(event.type =="mouseover")

the error break in firebug is on the line defining the mytext variable. but i suspect the problem is a syntax issue below that: if (event.type == "mouseover")

谢谢，丽兹

答

您需要这样命名事件参数:

You need to name the event parameter, like this:

$('area').bind('mouseover mouseleave', function(event){
                                                ^ add this

使用 .hover() 会容易一些，就像这样:

It's a bit easier to use .hover() though, like this:

$(function() {
  $('area').hover(function(){
    var countyname =  $(this).attr("alt");
    $('#mytext').html(countyname).addClass('textcontainer');
  }, function() {
    $('#mytext').text('').removeClass('textcontainer');
  });
});

它不是完全相同，但通常更好一些，它使用mouseenter和mouseleave而不是mouseover和mouseout(因此输入/离开孩子).

It's not exactly the same, but a bit better usually, it uses mouseenter and mouseleave rather than mouseover and mouseout (so it won't fire when entering/leaving children).

鼠标悬停/鼠标悬停时未定义jQuery事件

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