使用 JavaScript（或 jQuery）确定点击了地图 (imageMap) 中的哪个区域
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Determine which Area in a Map (imageMap) was clicked using JavaScript (or jQuery)
提问by Mike Sav
I'm writing a mock up (using HTML, JS/jQuery) and CSS for a client which involves having a single image (of an interface) with an Map applied to it. For reasons I won't explain when a certain area is clicked an action is performed which includes an animation, then changing the image src(so it looks like it is moving between interfaces) and then I apply a different imagemap to the image (perhaps I should say <img>tag)
我正在为一个客户端编写一个模型（使用 HTML、JS/jQuery）和 CSS，其中涉及一个应用了 Map 的单个图像（一个界面）。出于某些原因，我不会解释当单击某个区域时会执行一个动作，其中包括动画，然后更改图像src（因此它看起来像是在界面之间移动），然后我将不同的图像映射应用于图像（也许我应该说<img>标签）
The client asked for this, I know it seems like madness but I don't have any mockup tools to perform the animations, etc, etc...
客户要求这样做，我知道这看起来很疯狂，但我没有任何模型工具来执行动画等……
I've noticed a pattern and I could refactor my code so it is easier to extend and maintain. However I was wondering, say I have the following HTML:
我注意到一个模式，我可以重构我的代码，以便更容易扩展和维护。但是我想知道，假设我有以下 HTML：
<img src="claas_ipad3.jpg" USEMAP="#claas_ipad3" width="1130" height="871" alt="" border="0" id="mainPage">
<map name="claas_ipad3">
<area shape="rect" coords="181,249,255,341" href="" alt="" id="Contacts">
<area shape="rect" coords="345,251,454,341" href="" alt="" id="Appointments">
<area shape="rect" coords="533,256,576,311" href="" alt="" id="Maps">
<area shape="rect" coords="686,255,785,344" href="" alt="" id="Tasks">
<area shape="rect" coords="835,246,973,348" href="" alt="" id="Products">
<area shape="rect" coords="176,412,278,513" href="" alt="" id="Reports">
<area shape="rect" coords="330,411,457,513" href="" alt="" id="PriceTable">
<area shape="rect" coords="502,399,637,518" href="" alt="" id="SalesCycle">
<area shape="rect" coords="677,398,808,519" href="" alt="" id="MetaData">
<area shape="rect" coords="844,408,970,510" href="" alt="" id="Settings">
<area shape="rect" coords="173,545,283,662" href="" alt="" id="Vids">
<area shape="rect" coords="328,558,461,652" href="" alt="" id="Web">
<area shape="rect" coords="491,559,626,666" href="" alt="" id="Files">
</map>
Is it possible for me to determine using JavaScript or jQuery if an area was clicked? Then I could identify the ID and perform the correct actions. What I currently have is a lot of different conditions like so...
如果单击了某个区域，我是否可以确定使用 JavaScript 或 jQuery？然后我可以识别 ID 并执行正确的操作。我目前拥有的是很多不同的条件，例如......
$("#Contacts").click(function(event){
event.preventDefault();
// okay lets show the contacts interface
$("#mainPage").fadeOut(300, function(){
$(this).attr('src','claas_ipad3_1.jpg').bind('onreadystatechange load', function(){
if (this.complete){
$(this).fadeIn(300);
$(this).attr('USEMAP','#claas_ipad_1');
}
});
});
});
However if I know which area was clicked (by determining the id) I can apply array values into a generic function rather than binding to the map areas specifically.
但是，如果我知道点击了哪个区域（通过确定 id），我可以将数组值应用到通用函数中，而不是专门绑定到地图区域。
I was thinking I could determine the id of what was clicked something like this:
我在想我可以确定点击的内容的 id 是这样的：
$(this).live('click', function () {
alert($(this).attr('id'));
});
however this will affect my whole page, which isn't a problem but I know it won't work.
但是这会影响我的整个页面，这不是问题，但我知道它不起作用。
Sorry if I haven't explained myself well or my wording is poor. I can extend or reword if desired.
对不起，如果我没有很好地解释自己或者我的措辞很糟糕。如果需要，我可以扩展或改写。
Thanks
谢谢
UPDATE
更新
I have solved this, if I apply an ID to the Map using the following will return the ID
我已经解决了这个问题，如果我使用以下方法将 ID 应用到 Map 将返回 ID
$("#Map1 area").click( function () {
alert($(this).attr('id')); // this
});
采纳答案by jantimon
There are different approaches. I guess the easiest would be this one:
有不同的方法。我想最简单的是这个：
$("map[name=claas_ipad3] area").live('click', function () {
alert($(this).attr('id'));
});
Note that as of jQuery 1.7, the .live() method is deprecated and you should use .on() to attach event handlers:
请注意，从 jQuery 1.7 开始，不推荐使用 .live() 方法，您应该使用 .on() 附加事件处理程序：
$("map[name=claas_ipad3] area").on('click', function () {
alert($(this).attr('id'));
});
