H5+css3+js搭建帶驗證碼的登入頁面
阿新 • • 發佈：2019-02-17
login.html
<!DOCTYPE HTML> <html> <head> <title>EasyBuy後臺管理系統</title> <meta charset="utf-8"> <style> .main_bar{ width:1350px; height:350px; background-color:#6495ED; margin-top:10%; } #login_form{ width:40%; height:100%; background-color:#112435; margin:0 auto; } .title{ width:100%; height:55px; color:#ffffff; border-bottom:1px solid #ffffff; font-size:20pt; font-family:"微軟雅黑"; line-height:55px; text-align:center; } #form_widget{ width:100%; height:295px; background-color:#808080; } .txt{ display:block;/*設定為獨立塊（換行）*/ width:70%; margin:0 auto; height:35px; font-size:15pt; border-radius:5px;/*設定圓角樣式*/ border:0; padding-left:8px; } #vcode{ height:35px; width:40%; font-size:15pt; margin-left:15%; border-radius:5px; border:0; padding-left:8px; } #code{ color:#ffffff;/*字型顏色白色*/ background-color:#000000; font-size:20pt; font-family:"華康娃娃體W5"; padding:5px 35px 10px 35px; margin-left:5%; cursor:pointer; } #search_pass_link{ width:70%; text-align:right; margin:0 auto; padding:5px; } /*層級選擇器*/ #search_pass_link a{ color:#000000; text-decoration:none; } /*偽類*/ #search_pass_link a:hover{ color:#ff0000; text-decoration:underline; } .btn{ width:70%; margin-left:15%; height:40px; border:0; font-size:14pt; font-family;"微軟雅黑"; background-color:#FC5628; color:#ffffff; cursor:pointer;/*設定指標滑鼠的樣式*/ border-radius:20px;/*設定圓角樣式*/ border:0; } #copyright{ width:100%; text-align:center; padding-top:20px; font-family:"微軟雅黑"; color:#e0e0e0; } </style> </head> <body leftmargin="0" onload="changeImg()"> <div class="main_bar"> <div id="login_form"> <div class="title"> EasyBuy系統登入 </div> <form action="main.html" onsubmit="return check()"> <div id="form_widget"> <br> <input type="text" placeholder="請輸入賬號" id="box_name" class="txt" value="使用者名稱" onfocus="this.value=''" onblur="if(this.value=='')this.value='使用者名稱'"/> <br> <input type="password" placeholder="請輸入密碼" id="box_pass" class="txt" value="password" onfocus="this.value=''" onblur="if(this.value=='')this.value='password'"/> <br> <input type="text" id="vcode" placeholder="驗證碼" value="驗證碼" onfocus="this.value=''" onblur="if(this.value=='')this.value='驗證碼'"/><span id="code" title="看不清，換一張"></span> <div id="search_pass_link"> <a href="#">忘記密碼？</a> </div> <input type="submit" value="登入" class="btn" onmouseover="this.style.backgroundColor='#FF8D00'" onmouseout="this.style.backgroundColor='#FC5628'"> <br> <div id="copyright"> Power By WXH ©CopyRight 2016 </div> </div> </form> </div> </div> </body> <script type="text/javascript"> var code;//宣告一個變數用於儲存生成的驗證碼 document.getElementById("code").onclick=changeImg; function changeImg(){ //alert("換圖片"); var arrays=new Array( '1','2','3','4','5','6','7','8','9','0', 'a','b','c','d','e','f','g','h','i','j', 'k','l','m','n','o','p','q','r','s','t', 'u','v','w','x','y','z', 'A','B','C','D','E','F','G','H','I','J', 'K','L','M','N','O','P','Q','R','S','T', 'U','V','W','X','Y','Z' ); code='';//重新初始化驗證碼 //alert(arrays.length); //隨機從陣列中獲取四個元素組成驗證碼 for(var i=0;i<4;i++){ //隨機獲取一個數組的下標 var r=parseInt(Math.random()*arrays.length); code+=arrays[r]; //alert(arrays[r]); } //alert(code); document.getElementById('code').innerHTML=code;//將驗證碼寫入指定區域 } //效驗驗證碼(表單被提交時觸發) function check(){ //獲取使用者輸入的驗證碼 var input_code=document.getElementById('vcode').value; //alert(input_code+"----"+code); if(input_code.toLowerCase()==code.toLowerCase()) { //驗證碼正確(表單提交) return true; } alert("請輸入正確的驗證碼!"); //驗證碼不正確,表單不允許提交 return false; } </script> </html>