Transcript Document
JavaScript 102
Nancy Leiby
December 11, 2001
JavaScript 102
1
JavaScript Notes
• Debugging JavaScript in Netscape …
put ‘javascript:’ in the URL text box to
bring up the Console
• Netscape is pickier about JavaScript
• Case sensitive
• Two ways to specify the form:
– document.formname.fieldname…
– document.forms[0].fieldname…
JavaScript 102
2
1onLoad.cfm
• Perform an action when the page is
loaded using onLoad
• <BODY onLoad=“…”>
• Set the focus of the cursor to a text box
or other field in a form using the
JavaScript focus() function
JavaScript 102
3
2onSubmit.cfm
• Perform an action when the form is
submitted using onSubmit
• Use when validating data: option to not
submit the form when bad data found
• <FORM … onSubmit=“return …”>
• If true is returned, the form is submitted
• If false is returned, the form is not
submitted
JavaScript 102
4
3onClick.cfm, 3location.cfm
• Perform an action when an object is
selected using onClick
• Use with button, checkbox, radio, link
(image button)
• Validation
• Change the form action destination
using JavaScript document.location=
• <INPUT … onClick=“…”>
JavaScript 102
5
4dynamicfieldnames.cfm
• Access a field/object with a dynamically
created name
• Evaluate("form.fn"&i)
• document.formname.elements[“fn"+i]…
• Submit a form using the JavaScript
submit() function
JavaScript 102
6
5converttointeger.cfm
• In JavaScript multiply by 1to convert a
field value from a string (default) to a
number
• JavaScript append and numbers
JavaScript 102
7
6relatedlists.cfm
• Perform an action when a field is
changed using onChange
• <SELECT … onChange=“…”>
• Convert multi-dimensional arrays in CF
into JavaScript arrays using CFWDDX
• <CFWDDX action="CFML2JS" …
JavaScript 102
8
7callback.cfm, 7caller.cfm
• Open a page to allow the user to make
a selection and insert the selection on
the calling page
• Call a JavaScript function in the page
that opened the current page using
opener property.
JavaScript 102
9
Information
• Contact me at:
– [email protected]
• My favorite JavaScript book:
– JavaScript Bible by Danny Goodman
(IDG Books Worldwide, Inc.)
JavaScript 102
10