See Example:
Run Code Box
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <ptml xmlns=" http://www.w3.org/1999/xhtml "> <pead> <meta http-equiv=" Content-type "content=" text/html; Charset=utf-8 "/> <title>untitled document</title> </pead> <body> <li> <a href=" Http://www.blueidea.com/articleimg/bbsimg/smile.gif "/></a> <a href=" picture address > Open </a> </li> <li> <a href= "http://www.blueidea.com/articleimg/bbsimg/biggrin.gif"/></a> <a href= "Picture Address" > Open </a> </li> <li> <a href= "Http://www.blueidea.com/articleimg/bbsimg/confused.gif"/></a > <a href= "Picture address" > Open </a> </li> </body> </ptml> <script language= "javascript" type= " Text/javascript "> Document.body.onclick = function (evt) {evt = evt | | window.event; var o = Evt.target | | Evt.srcelement; window.open (O.previoussibling.href | | o.previoussIBLING.PREVIOUSSIBLING.HREF); return false; } </script>
[Ctrl + A ALL SELECT hint: You can modify some of the code, and then run]
Find Document.body.onclick = function (evt),
In IE, this evt is not, but under the Firefox (opera seems to be) will pass this parameter by default. In IE, this parameter is null, want to be compatible, just write.
Continue down:
EVT = EVT | | window.event;
In IE, EVT will point to: Window.event, under Firefox, will point to that default parameter.
Because under IE evt | | Window.event equivalent to: null | | Window.event, the result is still window.event.
And in Firefox, it's the equivalent of EVT | | NULL, the result is evt
Look down:
O.previoussibling.href | | O.previoussibling.previoussibling.href
The previous expression is used under IE, and the latter one is used under Firefox.
Firefox, there is no preservewhitespace this attribute, namely: The blank also as a node, and IE is the default false, that is, the white space is not considered a node.
Speaking of XMLDOM, it seems to be irrelevant, but under Firefox previoussibling is blank, unless there are no spaces between the two HTML tags.
<a href= "Http://www.blueidea.com/articleimg/bbsimg/smile.gif"/></a>
<a href= "Picture address" > Open </a>
Two <a> there is a newline (one of the spaces), so under Firefox, take the following one <a> the previous node, you must use:
O.previoussibling.previoussibling.href
Maybe you still don't see it, it doesn't matter, just give me a simple one:
Run Code Box
<script> function Test (p1,p2,p3) {p1 = P1 | | 100; P2 = P2 | | "Xlingfairy"; return "P1 =" + p1 + "P2 =" + P2 + "P3 =" + p3;} Alert (test ()); Alert (Test (Null,null, "blueidea.com") </script>
[Ctrl + A ALL SELECT hint: You can modify some of the code, and then run]
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