liuyan.html:

<meta charset="utf-8">

<script src="http://apps.bdimg.com/libs/jquery/1.6.4/jquery.min.js" type="text/javascript"></script>
<script>
$(function(){
 $("[name='sub']").click(function(){
  var data=$("[name='form']").serialize();
  $.post("liuyan.php",data,function(data){
   alert(data);
  }); 
}) 
})
</script>

<div class="content">
    <div class="right_news_content">
    
             <div style="padding:10px;">
    <form name="form"> 
    <table>
     <tr>
      <td class="font_set"><label for="contactName">联系人:</label></td>
      <td><input type="text" name="contactName"  class="z_cont">&nbsp;<span class="font_color">*</span></td>
     </tr>
     <tr>
      <td class="font_set"><label for="contactTell">联系电话:</label></td>
      <td><input type="text" name="contactTell" id="contactTell" class="z_cont">&nbsp;<span class="font_color">*</span></td>
     </tr>
     <tr>
      <td class="font_set"><label for="contactqq">QQ:</label></td>
      <td><input type="text" name="contactqq" id="contactqq" class="z_cont"></td>
     </tr>
     <tr>
      <td class="font_set"><label for="contactEmail">邮箱:</label></td>
      <td><input type="text" name="contactEmail" id="contactEmail" class="z_cont"></td>
     </tr>
     <tr>
      <td class="font_set"><label for="contactTitle">主题:</label></td>
      <td><input type="text" name="contactTitle" id="contactTitle" class="z_cont">&nbsp;<span class="font_color">*</span></td>
     </tr>
     <tr>
      <td class="font_set"><label for="contactContent">内容：</label></td>
      <td><textarea name="contactContent" id="contactContent" cols="39 " rows="5" style="border:1px solid #555;" ></textarea>&nbsp;<span class="font_color">*</span></td>
     </tr>
     <tr>
      <td colspan="2" align="center" style="" >
      <input name="sub" type="button" value="提交" style="cursor:pointer; font-size:16px; ">
      <input type="reset" value="重置" style="cursor:pointer; font-size:16px; margin-left:20px;">      
      </td>
      
     </tr>
    </table>
    </form>
    
    
    </div>
    
    
            </div>
</div>

liuyan.php:

<?php

print_r($_POST['contactName']);

?>