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PHP ??? ?? ?? ????: js? ???? ??? ???? ??? ??

QQ截圖20161130145506.png

js? ???? ??? ???? ???? ?????

<script>
     function CheckPost() {
         if(myform.user.value=="")
         {
             alert("請(qǐng)?zhí)顚懹脩?quot;);
             myform.user.focus();
             return false;
         }
         if (myform.title.value.length<5)
         {
             alert("標(biāo)題不能少于5個(gè)字符");
             myform.title.focus();
         return false;
         }
         if (myform.content.value=="")
         {
             alert("內(nèi)容不能為空");
             myform.content.focus();
             return false;
         }
     }
 </script>

?? ???? js ??? ???? ??? ??? ???? ???? ?? ??? ?? ? ????.

? ?? ?? ???

1. js? ???? ??? ?? ???? ???? ?????.

???? ??
||
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <link href="css.css" rel="stylesheet" type="text/css"> <title>Title</title> <?php include ("add.php")?> </head> <script> function CheckPost() { if(myform.user.value=="") { alert("請(qǐng)?zhí)顚懹脩?quot;); myform.user.focus(); return false; } if (myform.title.value.length<5) { alert("標(biāo)題不能少于5個(gè)字符"); myform.title.focus(); return false; } if (myform.content.value=="") { alert("內(nèi)容不能為空"); myform.content.focus(); return false; } } </script> <body> <b> <a href="list.php">瀏覽留言</a> </b> <hr size=1> <form action="add.php" method="post" name="myform" onsubmit="return CheckPost();"> 用戶：<input type="text" size="10" name="user"/><br> 標(biāo)題：<input type="text" name="title" /><br> 內(nèi)容：<textarea name="content"></textarea><br> <input type="submit" name="submit" value="發(fā)布留言" /> </form> </body> </html>