摘要： $(document).ready(function(){ //focusblur jQuery.focusblur = function(focusid) { var focusblurid = $(focusid); var defval = focusblurid.val(); focusblurid.focus(function(){ var thisval = $(this).val(); if(thisval==defval){ $(this).val(""); } }); focusblurid.blur(function(){ var thisval =.. 阅读全文