Adobe 38040334 Extending Dreamweaver - Page 214

DREAMWEAVER CS3 208 Extending Dreamweaver If the editor contains a text field for editing the zip attribute, the function needs to initialize the form element so that the user sees the actual ZIP code in the text field, rather than an empty field. The following code performs the initialization: function inspectTag(tag) { document.forms[0].zip.value = tag.zip } validateTag() Availability Dreamweaver MX. Description When a user clicks on a node in the tree control or clicks OK, the function performs input validation on the currently displayed HTML form elements. Arguments None. Returns Dreamweaver expects a Boolean value: true if the input for HTML form elements is valid; false if input values are not valid. Example When the user creates a table, a negative integer is entered for the number of table rows. The validateTag() function detects the invalid input, displays an alert message, and returns a false value. applyTag() Availability Dreamweaver MX. Description When the user clicks OK, Dreamweaver calls the validateTag() function. If the validateTag() function returns a true value, Dreamweaver calls this function and passes the dom object that represents the current tag (the tag that is being edited). The function reads the values out of the form elements and writes them into the dom object. Arguments tag • The tag argument is the DOM node of the tag being edited. Returns Dreamweaver expects nothing. Example Continuing the cfweather example, in the following code, if the user changes the ZIP code from 94065 to 53402, in order to update the user's document to use the new ZIP code, the dom object must be updated: