Mega Code Archive
Catching an Error
<![CDATA[
<HTML>
<TITLE>Catch that error!</TITLE>
<SCRIPT>
function catchError(errString) {
try {
try {
if (errString == 42)
throw new Error (42, "errString is 42 !");
else
throw new Error (0, "errString is NOT 42 !");
}
catch(e) {
if (e.number == 42)
return (e.description + " Got this one!");
else
throw e; // re-throw the error
}
}
catch (e){
return(e.description + " This one not handled here!");
}
}
</SCRIPT>
</HEAD>
<BODY>
<H1>
Catch that error!
</H1>
<FORM name="theForm">
<TABLE>
<TR><TD colspan=2> We can handle 42: </TD><TD><INPUT type=text name=errText size=40 value="42"></TD></TR>
<TR><TD colspan=2></TD>
<TD><INPUT type=button name=btnThrow value="Catch it!" onClick="alert(catchError(document.theForm.errText.value));">
</TD>
</TR>
</TABLE>
</FORM>
</BODY>
</HTML>
]]>