- rspecialurl = /href|src|style/,
- rtype = /(button|input)/i,
- rfocusable = /(button|input|object|select|textarea)/i,
- rclickable = /^(a|area)$/i,
- rradiocheck = /radio|checkbox/;
+ rspecialurl = /^(?:href|src|style)$/,
+ rtype = /^(?:button|input)$/i,
+ rfocusable = /^(?:button|input|object|select|textarea)$/i,
+ rclickable = /^a(?:rea)?$/i,
+ rradiocheck = /^(?:radio|checkbox)$/i;