Appendix L Introduction to XHTML: Part 2 1469 we introduce two new inputtypes. The first type is the radio button (lines 90 113), specified with type “radio”. Radio buttons are similar to checkboxes, except that only one radio button in a group of radio buttons may be selected at any time. All radio buttons in a group have the same nameattribute; they are distinguished by their different valueattributes. The attribute value pair checked = “checked” (line 92) indicates which radio button, if any, is selected initially. The checkedattribute also applies to checkboxes. 1 2 4 5 6 7 8 9 10 11 12 13 14 15

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