UGGGG, trying so hard

Ok, I have been spending hours on this feature, I have been trying to add a “If Statement” for this script. What I wanted it to do is add the if statment at this part…

do script "
with (frames['TargetContent']) {
   main.CLASS_SRCH_WRK2_CAMPUS.selectedIndex = 1;
  main.CLASS_SRCH_WRK2_INSTRUCTION_MODE.selectedIndex = 8;
   submitAction_main(document.main,'CLASS_SRCH_WRK2_CLASS_SRCH_PB');
}
" window (item 1 of (get ListWindows))

The probelm is that if you enter a class number to far a head, there web site says, “The search returns no results that match the criteria specifed” at the bottom, if it hits that I want the script to kill its self right there. But I have had major complications. Can anyone help me on this. Down below is the full script, run it and you will see what I mean. Thank you so so much.

try
	tell application "Internet Explorer" to quit
	tell application "BBEdit 6.5" to quit
end try

delay 20

tell application "Internet Explorer"
	Activate
	GetURL ("http://studentadmin.connectnd.us:8080/psp/NDPP84/EMPLOYEE/NDSP80/e/?url=http%3a%2f%2fstudentadmin.connectnd.us%3a80%2fservlets%2ficlientservlet%2fNDSP80%2f%3fICType%3dPanel%26Menu%3dCOMMUNITY_ACCESS%26Market%3dGBL%26PanelGroupName%3dCLASS_SEARCH" as string)
	
	my waitLoaded()
	
	(*Change number value for diff. semester
0510	  2004 Fall
0520	  2004 Winter
0530	  2005 Spring
0540	  2005 Summer
0610	  2005 Fall *)
	
	do script "
with (frames['TargetContent']) {
   main.CLASS_SRCH_WRK2_INSTITUTION.selectedIndex = 5;
   main.CLASS_SRCH_WRK2_STRM.value = '0520';
   submitAction_main(document.main,'CLASS_SRCH_ADV');
}
" window (item 1 of (get ListWindows))
	
	my waitLoaded()
	
	do script "
with (frames['TargetContent']) {
   main.CLASS_SRCH_WRK2_CAMPUS.selectedIndex = 1;
  main.CLASS_SRCH_WRK2_INSTRUCTION_MODE.selectedIndex = 8;
   submitAction_main(document.main,'CLASS_SRCH_WRK2_CLASS_SRCH_PB');
}
" window (item 1 of (get ListWindows))
	
	my waitLoaded()
	
	with timeout of (30 * minutes) seconds
		do script "
with (frames['TargetContent']) {
   submitAction_main(document.main, '#ICOK');
}
" window (item 1 of (get ListWindows))
	end timeout
end tell

to waitLoaded()
	tell application "Internet Explorer"
		repeat
			delay 3
			if (do script "frames['TargetContent'].document.readyState" window (item 1 of (get ListWindows))) = "complete" then exit repeat
		end repeat
	end tell
end waitLoaded


tell application "System Events"
	tell application process "Internet Explorer"
		delay 30
		tell window 1
			keystroke "a" using command down
			keystroke "c" using command down
		end tell
	end tell
end tell

delay 3 --> Seems to help

(* Define the file contents and write the file *)
tell me
	activate
	set theFileContents to the clipboard
end tell

tell application "BBEdit 6.5"
	activate
	
	tell application "System Events"
		tell application process "BBEdit 6.5"
			delay 20
			tell window 1
				keystroke "v" using command down
			end tell
		end tell
	end tell
	
	save document 1 to (((path to desktop) as string) & "Hybrid")
	try
		open for access theTargetFile with write permission
		set eof of theTargetFile to 0
		write (theFileContents) to theTargetFile starting at eof
		close access theTargetFile
		
	on error
		try
			close access theTargetFile
		end try
	end try
	
end tell

try
	tell application "Internet Explorer" to quit
	tell application "BBEdit 6.5" to quit
end try