用JQuery找到最大值和最小值

在一个表格中找到最大值和最小值，请帮忙！！！！！<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script type="text/javascript" src="JQuery/jquery-1.10.1.js"></script><script type="text/javascript">
$(document).ready(function() {
        $(".red_one",this).each(function() {
            var num = parseInt(this.innerHTML);
alert(num);
        });
    });
</script>
</head><body><table width="500" border="1" cellspacing="0" cellpadding="0">
  <tr>
    <td class="red_one">01</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td class="red_one">04</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr>
    <td class="red_one">09</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
</table>
</body>
</html>
jQueryJavaScript

解决方案 »

  1.   

    找" <td class="red_one">01</td>"这个吗?
      

  2.   


     $(document).ready(function() {
            var maxNum=0;
            var minNum=parseInt($(".red_one",this).eq(0).html());
            $(".red_one",this).each(function() {
                var num = parseInt(this.innerHTML);
                if(num>maxNum)
                {maxNum=num;}
                 if(num<minNum)
                {
                  minNum=num;
                }
            });
            alert(maxNum);
    alert(minNum);
        });
      

  3.   


    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>无标题文档</title>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
     </head>
     
    <body>
     
    <table width="500" border="1" cellspacing="0" cellpadding="0">
      <tr>
        <td class="red_one">01</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
      </tr>
      <tr>
        <td class="red_one">04</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
      </tr>
      <tr>
        <td class="red_one">09</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
      </tr>
    </table>
    <script type="text/javascript">
        jQuery(function($) {
    var oa=[];
            $(".red_one").each(function() {
                //var num = parseInt(this.innerHTML);
                //alert(num);
    oa.push($(this).html());
            });
    oa.sort();
    alert('max:'+oa[oa.length-1]+',min:'+oa[0]);
        });
    </script>
    </body>
    </html>
      

  4.   

    4楼的错了，示例:<script type="text/javascript">
        jQuery(function($) {
    var oa=[1,10,11,9,90,100,2];
    oa.sort(function(a,b){
    return a-b;
    });
    alert('max:'+oa[oa.length-1]+',min:'+oa[0]);
        });
    </script>
      

  5.   

    var arr = [];
    $('table tr').each(function() {
      $(this).find('td').each(function() {
        arr.push($(this).val());
      });
    });arr.sort(function(value1, value2) {
      return value2 - value1;
    });alert(arr[0] + ' ' + arr[arr.length-1]);
      

  6.   

    注意一个事实：parseInt('09') 得到的是 0 而不是 9
    $(document).ready(function() {
      var max='00', min='99';
      $(".red_one").each(function() {
        var t = $(this).html();
        max = t > max ? t : max;
        min = t < min ? t : min;
      });
      alert('max:'+max+' min:'+min);
    });
      

  7.   

     $(document).ready(function() {
            var maxNum=0;
            var minNum=parseInt($(".red_one",this).eq(0).html());
            $(".red_one",this).each(function() {
                var num = parseInt(this.innerHTML);
                if(num>maxNum)
                {maxNum=num;}
                 if(num<minNum)
                {
                  minNum=num;
                }
            });
            alert(maxNum);
    alert(minNum);
        });