Enables select, right-click, copy and drag on pages that disable them.
当前为
1) This script disables the ".preventDefault()" function for 'copy', 'contextmenu', 'select', 'selectstart', 'dragstart', 'beforecopy' events
2) This script disables the "return false" in HTML attributes 'oncopy', 'oncontextmenu', 'onselect', 'onselectstart', 'ondragstart', 'onbeforecopy'
3) This script disables the "returnValue" in javascript coding for 'copy', 'contextmenu', 'select', 'selectstart', 'dragstart', 'beforecopy' events
