onerror事件可以控制,这个是msdn上的
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DIV.error {background-color: #CFCFCF; border: "1 solid"; font-size: 8pt; font-family: Arial; border-top-color: #EFEFEF; border-left-color: #EFEFEF; border-right-color: #C0C0C0; border-bottom-color: #C0C0C0;}
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window.onerror=fnErrorTrap;
function fnInit(){}
function fnErrorTrap(msg,url,line)
{
oErrorLog.innerHTML="<b>An error was thrown and caught.</b><p>";
oErrorLog.innerHTML+="Error: " + msg + "<br>";
oErrorLog.innerHTML+="Line: " + line + "<br>";
oErrorLog.innerHTML+="URL: " + url + "<br>";
return true;
}
function fnThrow(){
eval(oErrorCode.value);
}
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<BLOCKQUOTE CLASS="body"><H1>onerror Event Sample</H1>
<P>
<INPUT TYPE=text ID="oErrorCode" VALUE="someObject.someProperty=true;">
<INPUT TYPE=button value="Throw Error" onclick="fnThrow()">
<P>
<DIV ID="oErrorLog" CLASS="error">
</DIV>
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© <A CLASS="clsIncCpyRt" HREF="http://msdn.microsoft.com/isapi/gomscom.asp?target=/misc/cpyright.htm" TARGET="_top">2000 Microsoft Corporation. All rights reserved. Terms of use</A>.
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<TITLE>onerror Event Sample</TITLE>
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<META NAME="MS.LOCALE" CONTENT="EN-US">
<META NAME="ROBOTS" CONTENT="noindex">
<STYLE>
DIV.error {background-color: #CFCFCF; border: "1 solid"; font-size: 8pt; font-family: Arial; border-top-color: #EFEFEF; border-left-color: #EFEFEF; border-right-color: #C0C0C0; border-bottom-color: #C0C0C0;}
</STYLE><SCRIPT>
window.onerror=fnErrorTrap;
function fnInit(){}
function fnErrorTrap(msg,url,line)
{
oErrorLog.innerHTML="<b>An error was thrown and caught.</b><p>";
oErrorLog.innerHTML+="Error: " + msg + "<br>";
oErrorLog.innerHTML+="Line: " + line + "<br>";
oErrorLog.innerHTML+="URL: " + url + "<br>";
return true;
}
function fnThrow(){
eval(oErrorCode.value);
}
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<BLOCKQUOTE CLASS="body"><H1>onerror Event Sample</H1>
<P>
<INPUT TYPE=text ID="oErrorCode" VALUE="someObject.someProperty=true;">
<INPUT TYPE=button value="Throw Error" onclick="fnThrow()">
<P>
<DIV ID="oErrorLog" CLASS="error">
</DIV>
<!-- START_PAGE_FOOTER -->
<BR><BR><BR>
© <A CLASS="clsIncCpyRt" HREF="http://msdn.microsoft.com/isapi/gomscom.asp?target=/misc/cpyright.htm" TARGET="_top">2000 Microsoft Corporation. All rights reserved. Terms of use</A>.
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tryStatements}
catch(exception){
catchStatements}
finally {
finallyStatements}
参数
tryStatement
必选项。可能发生错误的语句。
exception
必选项。任何变量名。exception 的初始化值是扔出的错误的值。
catchStatement
可选项。处理在相关联的 tryStatement 中发生的错误的语句。
finallyStatements
可选项。在所有其他过程发生之后无条件执行的语句。
try
{
//待捕获异常代码;
...
}
catch(e)
{
//出现异常处理代码
....
}