由於項目需求，簡單地寫了一個input預設值設定
<!DOCTYPE HTML><html><head><meta charset="utf-8"><title>input預設值設定</title><script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script><script type="text/javascript">$(function() { //集體調用$(".form input").each(function(){$(this).setDefauleValue();});//單個調用$("#key").setDefauleValue();})//設定input,textarea預設值$.fn.setDefauleValue = function() { var defauleValue = $(this).val();$(this).val(defauleValue).css("color","#999"); return this.each(function() { $(this).focus(function() { if ($(this).val() == defauleValue) { $(this).val("").css("color","#000");//輸入值的顏色 } }).blur(function() { if ($(this).val() == "") { $(this).val(defauleValue).css("color","#999");//預設值的顏色 } }); });}</script></head><body><form class="form"> <input type="text" size="30" value="輸入暱稱"> <br> <input type="text" size="30" value="輸入姓名"></form><br><br><br><input type="text" size="30" id="key" value="輸入學員ID、姓名、暱稱進行尋找"></body></html>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
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