By Shawn M. Lauriat
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Each function sets the title attribute and sets an onblur event to remove the title attribute (because once the users listen to the updated content and move on, the interface should not instruct the users to enable the virtual buffer should they want to revisit the element in question); the script also sets a tabindex of -1 to ensure that the focus() call will work and then inserts the new content into the DOM and draws focus to it: /** * Abstract out the replacement of text to add screen reader support.
As described in a number of the checklist items, in order to meet WCAG level 2 standards, a web application must use semantic markup. Any headings must properly use the h1 through h6 tags, lists must use the markup available for describing and organizing lists (dl, ol, and ul), and quotations must use the markup available rather than a given string simply having quotation marks surround it. 48 Chapter 2 Accessibility This requirement poses a difﬁcult problem for those writing markup, as IE does not actually support the q tag for an inline quote.
Thus, the caption tag gives context to the table headings about to get read out to the user. By adding a summary attribute to the table when appropriate, users with screen readers will have an even better idea of what the table has organized before they get lost in the sea of table cells. IE does not render a table until all the table’s contents loads into the browser. This means that when a table contains thousands of rows of data, IE users will simply get a blank screen until the entire contents load, at which point the data will appear on the screen all at once.