function cleanDeleteReason(){ //Declare the function and its parameters
var wpReason = document.getElementById("wpReason"); //declare a variable and set its value
if (!wpReason) return; //if there's no such thing (i.e. the
//previous line didn't find an
//element with that id) then return
var regexp = /(content was|page was empty|content before blanking was)/i; //create a regexp object which
//matches the default delete reasons
if (regexp.test(wpReason.value)){ //if the regexp object we created tests true against the value
//of wpReason (which is a DOM element)...
wpReason.value = ""; //then set the value of wpReason to an empty string
}
}
if (wgAction == 'delete') addOnloadHook(cleanDeleteReason); //if the current action is deleting, then hook onto page load
//and run the cleanDeleteReason function