blocks|key|1762162|text|<h:commandLink+id="myCommandLink"+action="#{myPageCode.doDelete}">
++++<h:outputText+value="#{msgs.deleteText}"+/>
</h:commandLink>
<script+type="text/javascript">
if+(document.getElementById)+{
++++var+commandLink+=+document.getElementById('<c:out+value="${myPageCode.myCommandLinkClientId}"+/>');
++++if+(commandLink+&&+commandLink.onclick)+{
++++++++var+commandLinkOnclick+=+commandLink.onclick;
++++++++commandLink.onclick+=+function()+{
++++++++++++var+result+=+confirm('Do+you+really+want+to+<c:out+value="${msgs.deleteText}"+/>?');
++++++++++++if+(result)+{
++++++++++++++++return+commandLinkOnclick();
++++++++++++}
++++++++++++return+false;
++++++++}
++++}
}
</script>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1762163|可以通过将对confirm()的调用替换为对另一个函数的调用来执行其他Javascript操作(如验证表单输入等)。|unstyled|offset|length|style|CODE|1762164|entityMap^0|0|6|9|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>&lt;h:commandLink id="myCommandLink" action="#{myPageCode.doDelete}"&gt;
 &lt;h:outputText value="#{msgs.deleteText}" /&gt;
&lt;/h:commandLink&gt;
&lt;script type="text/javascript"&gt;
if (document.getElementById) {
 var commandLink = document.getElementById('&lt;c:out value="${myPageCode.myCommandLinkClientId}" /&gt;');
 if (commandLink &amp;&amp; commandLink.onclick) {
 var commandLinkOnclick = commandLink.onclick;
 commandLink.onclick = function() {
 var result = confirm('Do you really want to &lt;c:out value="${msgs.deleteText}" /&gt;?');
 if (result) {
 return commandLinkOnclick();
 }
 return false;
 }
 }
}
&lt;/script&gt;
</code></pre>

Other Javascript actions (like validating form input etc) could be performed by replacing the call to <code>confirm()</code> with a call to another function.

blocks|key|1547548|text|可以像这样简化|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1547549|onclick="return+confirm('Are+you+sure?');"|code-block|syntax|javascript|1547550|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Can be simplified like this

<pre><code>onclick="return confirm('Are you sure?');"
</code></pre>

blocks|key|1762472|text|这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1762473|<h:commandButton+title="#{bundle.NewPatient}"+action="#{identifController.prepareCreate}"++
+++++++++++++++++++++++++++++++++++++++++++++id="newibutton"+
+++++++++++++++++++++++++++++++++++++++++++++onclick="if(confirm('#{bundle.NewPatient}?'))return+true;+else+return+false;"+
+++++++++++++++++++++++++++++++++++++++++++++value="#{bundle.NewPatient}"/>|code-block|syntax|javascript|1762474|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This worked for me:

<pre><code>&lt;h:commandButton title="#{bundle.NewPatient}" action="#{identifController.prepareCreate}" 
 id="newibutton" 
 onclick="if(confirm('#{bundle.NewPatient}?'))return true; else return false;" 
 value="#{bundle.NewPatient}"/&gt;
</code></pre>

blocks|key|1762218|text|您仍然可以使用onclick。JSF+(参见render+kit+specification行为)描述了链接应该如何处理它。下面是重要的部分(它为onclick呈现的内容)：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1762219|var+a=function(){/*your+onclick*/};+var+b=function(){/*JSF+onclick*/};+return+(a()==false)+?+false+:+b();|code-block|syntax|javascript|1762220|所以你的函数不会被传递给事件对象(无论如何这不是跨浏览器的可靠的)，但是返回true/false会缩短提交的过程。|1762221|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/javaee/javaserverfaces/1.2/docs/renderkitdocs/HTML_BASIC/javax.faces.Commandjavax.faces.Link.html^0|M|O|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

You can still use onclick. The JSF <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/renderkitdocs/HTML_BASIC/javax.faces.Commandjavax.faces.Link.html" rel="nofollow noreferrer">render kit specification</a> (see Encode Behavior) describes how the link should handle it. Here is the important part (what it renders for onclick):

<pre><code>var a=function(){/*your onclick*/}; var b=function(){/*JSF onclick*/}; return (a()==false) ? false : b();
</code></pre>

So your function wont be passed the event object (which isn't reliable cross browser anyway), but returning true/false will short-circuit the submission.

blocks|key|1547369|text|在JSF1.2中，您可以指定onclick事件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1547370|此外，MyFaces或IceFaces等其他库也实现了"onclick“处理程序。|offset|length|1547371|然后你需要做的很简单：|1547372|<h:commandLink+action="#{bean.action}"+onclick="if(confirm('Are+you+sure?'))+return+false;"+/>|code-block|syntax|javascript|1547373|注意:您不能只做return+confirm(...)，因为这将阻止onClick事件中的其余JavaScript发生，这将有效地阻止您的操作发生，无论用户返回什么！|style|CODE|1547374|entityMap|0|LINK|mutability|MUTABLE|url|http://myfaces.apache.org/|1|http://www.icefaces.org/^0|0|3|7|0|B|8|1|0|0|0|8|J|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@$D|12|E|13|1|14]|$D|15|E|16|1|17]]|A|$]]|$1|F|3|G|5|6|7|18|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|19|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|1A|8|@$D|1B|E|1C|O|P]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]|Y|$5|T|U|V|A|$W|Z]]]]

In JSF 1.2 you can specify onclick events.

Also, other libraries such as <a href="http://myfaces.apache.org/" rel="nofollow noreferrer">MyFaces</a> or <a href="http://www.icefaces.org" rel="nofollow noreferrer">IceFaces</a> implement the "onclick" handler.

What you'd need to do then is simply:

<pre><code>&lt;h:commandLink action="#{bean.action}" onclick="if(confirm('Are you sure?')) return false;" /&gt;
</code></pre>

Note: you can't just do <code>return confirm(...)</code> as this will block the rest of the JavaScript in the onClick event from happening, which would effectively stop your action from happening no matter what the user returned!

blocks|key|1762335|text|如果您想要在发布表单之前执行某些操作，例如为了进行确认，可以尝试使用表单event+onSubmit。类似于：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1762336|myform.onsubmit+=+function(){confirm("really+really+sure?")};|code-block|syntax|javascript|1762337|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you want to execute something before the form is posted, for confirmation for example, try the form event onSubmit. Something like:

<pre><code>myform.onsubmit = function(){confirm("really really sure?")};
</code></pre>

blocks|key|1762373|text|这对我从来都不管用，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1762374|+onclick="if(confirm('Are+you+sure?'))+return+false;"+/>|code-block|syntax|javascript|1762375|但这确实做到了|1762376|onclick="if(confirm(\"Are+you+sure?\"))return+true;+else+return+false;"|1762377|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

This never worked for me, 

<pre><code> onclick="if(confirm('Are you sure?')) return false;" /&gt;
</code></pre>

but this did

<pre><code>onclick="if(confirm(\"Are you sure?\"))return true; else return false;"
</code></pre>

blocks|key|1547569|text|var+deleteClick;
var+mess="xxx";
function+assignDeleteClick(link)+{
++++if+(link.onclick+==+confirmDelete)+{
++++++++return;
++++}
++++deleteClick+=+link.onclick;
++++link.onclick+=+confirmDelete;
}


function+confirmDelete()+{
++++var+ans+=+confirm(mess);
++++if+(ans+==+true)+{
++++++++return+deleteClick();
++++}+else+{
++++++++return+false;
++++}
}+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1547570|将此代码用于jsf+1.1。|unstyled|1547571|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var deleteClick;
var mess="xxx";
function assignDeleteClick(link) {
 if (link.onclick == confirmDelete) {
 return;
 }
 deleteClick = link.onclick;
 link.onclick = confirmDelete;
}


function confirmDelete() {
 var ans = confirm(mess);
 if (ans == true) {
 return deleteClick();
 } else {
 return false;
 }
} 
</code></pre>

use this code for jsf 1.1.

If you have a JSF <code>&lt;h:commandLink&gt;</code> (which uses the <code>onclick</code> event of an <code>&lt;a&gt;</code> to submit the current form), how do you execute JavaScript (such as asking for delete confirmation) prior to the action being performed?

How can I execute Javascript before a JSF <h:commandLink> action is performed?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如果您有一个JSF <h:commandLink> (它使用<a>的onclick事件来提交当前表单)，那么如何在执行操作之前执行JavaScript (比如要求删除确认)？

问如何在执行JSF <h:commandLink>操作之前执行Javascript？
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问如何在执行JSF <h:commandLink>操作之前执行Javascript？
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