JS exception capture try and catch statements

You can also use the try {} catch () {} statement block in Js. Example:

1. If a JS error occurs, ask if you want to continue checking.

Code:

1. <SCRIPT type = "text/JavaScript">
2. Function Test (){
3. Try {
4. Allet (); // alert is wrong
5. } Catch (ERR ){
6. Document. writeln ("catch exceptions and start to execute Catch Block statements ---> ");
7. Document. writeln ("error name:" + err. Name + "---> ");
8. Document. writeln ("error message:" + err. Message + "---> ");
10. TXT = "Page error! "
11. TXT + = "click" OK "to continue viewing the current page ,"
12. TXT + = "click Cancel to return to the previous page. "
13. If (! Confirm (txt )){
14. History. Back ();
15. }
16. } Finally {
17. Document. writeln ("start to execute the finally BLOCK statement ")
18. }
20. }
21. </SCRIPT>

2. Another example

Code:

1. <Script language = "JavaScript">
2. Try {
3. Document. writeln ("start to execute the try BLOCK statement ---> ")
4. Document. writeln ("no exceptions yet ---> ")
5. Alert (prompt ("enter a value :","")))
6. } Catch (ERR ){
7. Document. writeln ("catch exceptions and start to execute Catch Block statements ---> ");
8. Document. writeln ("error name:" + err. Name + "---> ");
9. Document. writeln ("error message:" + err. Message + "---> ");
10. } Finally {
11. Document. writeln ("start to execute the finally BLOCK statement ")
12. }
13. </SCRIPT>