代碼很簡單，這里就不多廢話了。
<!DOCTYPE html><html><head><meta charset="utf-8"><title>測試文件</title><style>.reply { width: 500px; height: 100%; overflow: hidden; background-color:#CCC; margin-top: 10px;}.infoArea { width: 380px; height: 100%; overflow: hidden;}.words { width: 380px; height: auto; margin: 5px 0px; float: left; font-size: 14px;}.time { margin-left: 10px; margin-bottom: 3px; width: 150px; height: 20px; line-height: 20px; float: left; font-family: 楷體; font-size: 14px; color: #999;}.replyButton { width: 60px; height: 20px; float: left; margin-bottom: 10px;}.replyButton input { font-size: 12px;}#cancelButton { visibility: hidden;}</style></head><body><div class="reply"> <div class="infoArea"> <div class="words"><a href="">中央情報局</a>:中央情報局</div> <div class="time">2014年5月4日21:56</div> <div class="replyButton"> <input type="button" id="submitButton" value="回復(fù)" onClick="showReplyArea(this)" /> </div> <div class="replyButton"> <input type="button" id="cancelButton" value="取消" onClick="hideReplyArea(this)" /> </div> </div></div><script>//顯示文本框的函數(shù)function showReplyArea(src){ inputText = document.createElement("DIV"); inputText.className = "inputText"; inputText.style.width = '100%'; inputText.style.height = '75px'; inputText.style.margin = '3px 0'; inputText.style.cssFloat = 'left'; var grandfather = src.parentNode.parentNode.parentNode; grandfather.appendChild(inputText); form1 = document.createElement("FORM"); form1.action = ""; form1.method = "post"; inputText.appendChild(form1); inputTextArea = document.createElement("TEXTAREA"); inputTextArea.style.width = '380px'; inputTextArea.style.height = '40px'; inputTextArea.style.marginLeft = '60px'; inputTextArea.style.marginTop = '3px'; inputTextArea.style.cssFloat = 'left'; inputTextArea.style.resize = 'none'; textSubmit = document.createElement("INPUT"); textSubmit.type = 'submit'; textSubmit.value = '提交'; textSubmit.style.marginLeft = '80px'; textSubmit.style.cssFloat = 'left'; form1.appendChild(inputTextArea); form1.appendChild(textSubmit); cancelButton = grandfather.getElementsByTagName("INPUT").item(1); cancelButton.style.visibility = 'visible'; submitButton = src; submitButton.disabled = true;}//隱藏文本框的函數(shù)function hideReplyArea(src){ var grandfather = src.parentNode.parentNode.parentNode; var inputText = grandfather.getElementsByClassName('inputText').item(0); grandfather.removeChild(inputText); cancelButton = src; cancelButton.style.visibility = 'hidden'; submitButton = grandfather.getElementsByTagName("INPUT").item(0); submitButton.disabled = false;}//下面為調(diào)試時測試用函數(shù)，做完后就沒用了，但也是很經(jīng)典的一段代碼，就留在這里了。function showNode(){ var i = 4; submitButton = document.getElementById('submitButton'); i = submitButton.parentNode.parentNode.getElementsByTagName("INPUT").item(1).value; alert(i);}</script></body></html>示例二：
window.onload = function(){ var gaga = document.getElementById( "gaga" ); addClass( gaga,"gaga1" ) addClass( gaga,"gaxx" ); removeClass( gaga,"gaga1" ) removeClass( gaga,"gaga" ) function hasClass( elements,cName ){ return !!elements.className.match( new RegExp( "(//s|^)" + cName + "(//s|$)") ); // ( //s|^ ) 判斷前面是否有空格 （//s | $ ）判斷后面是否有空格 兩個感嘆號為轉(zhuǎn)換為布爾值 以方便做判斷 }; function addClass( elements,cName ){ if( !hasClass( elements,cName ) ){ elements.className += " " + cName; }; }; function removeClass( elements,cName ){ if( hasClass( elements,cName ) ){ elements.className = elements.className.replace( new RegExp( "(//s|^)" + cName + "(//s|$)" )," " ); // replace方法是替換 }; }; };以上所述就是本文的全部內(nèi)容了，希望大家能夠喜歡。
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