js的前台验证

< script >   
  function    deleteLine()  
  {  
  for    ( var    i = tbody1.children.length - 1 ;   i >= 0    ;   i --    )  
  if    (tbody1.children[i].firstChild.firstChild.checked)  
  tbody1.deleteRow(i);  
  }  
  function    addLine()  
  {  
  elm   =    thead1.lastChild.cloneNode( true )  
  elm.style.display = " block " ;  
  tbody1.insertBefore(elm);  
  }  
 
 
  function check(f){
    var row,cell
    for ( var i = 0 ;i < tbody1.rows.length;i ++ ){
      row = tbody1.rows[i];
      o = row.cells[ 1 ].firstChild;
      if ( ! / [/u4e00-/u9fa5] / g.test(o.value) || / [,，] / g.test(o.value)){
        alert( ' 品牌请输入中文并且不能含逗号！ ' );
        o.focus();
        return false ;
      }
      o = row.cells[ 2 ].firstChild;
      if (o.value == "" || isNaN(o.value)){
        alert( ' 数量为数量！ ' );
        o.focus();
        return false ;
      }
      o = row.cells[ 3 ].firstChild;
      if ( ! / ^/d{4}-/d{1,2}-/d{1,2}$ / .test(o.value)){
        alert( ' 时间格式为2008-10-17，格式不正确！ ' );
        o.focus();
        return false ;
      }
    }
  }
< / script> 

< form method = " post " onsubmit = " return check(this) " >
< TABLE cellSpacing = 1 cellPadding = 0 width = " 400 " bgColor = #cccccc border = 0 >< TBODY >
  < thead   id = thead1 >   
      < TR bgColor = #f5f5f5 height = 25 >
        < td height = " 30 " colspan = " 4 " > 行是动态增减, 文本框对应的要求是
        1 .输入中文,不能含有逗号
        2 .数值3.日期 .请高手告知js的前台验证. 万分感激:) < / td>
      < / tr>
      < TR bgColor = #f5f5f5 height = 25 >     
        < td width = " 38 " height = " 30 " align = " center " > 选中 < / td>  
        < td width = " 163 " > 品牌(中文不能有,号) < / td>  
        < td width = " 82 " > 数量(数值) < / td>
        < td width = " 112 " > 要求时间(日期) < / td>
      < / tr>  
      < TR bgColor = #ffffff height = 25 style = " display:none " >     
        < td height = " 25 " >< input   type = checkbox   id = checkLine >< / td>  
          < td >< INPUT   name = brand id = " brand "    size = 10 maxlength = " 50 " >< / td>  
          < td >< INPUT   name = amount id = " amount "    size = 6 maxlength = " 20 " >< / td>
          < td >< INPUT   name = datelimit id = " datelimit " size = 12 maxlength = " 50 " >< / td>
      < / tr>  
  < / thead>  
  < tbody id = tbody1 >   
     < TR bgColor = #ffffff height = 25 >    
        < td height = " 25 " >< input   type = checkbox   id = checkLine >< / td>  
          < td >< INPUT   name = brand id = " brand "    size = 10 maxlength = " 50 " >< / td>  
          < td >< INPUT   name = amount id = " amount "    size = 6 maxlength = " 20 " >< / td>
          < td >< INPUT   name = datelimit id = " datelimit "   size = 12 maxlength = " 12 " >< / td>
      < / tr>
  < / tbody>  
      < TR bgColor = #ffffff height = 25 >
        < td height = " 25 " colspan = " 4 " >& nbsp; & nbsp;
          & nbsp; & nbsp; & nbsp;
          < input name = " button2 "   type = button   onclick = " addLine() "    value = 添加 / >
          & nbsp; & nbsp;
          < input name = " button4 "    type = button   onclick = " deleteLine() "    value = 删除 / >
          & nbsp; & nbsp;
          < input name = " button4 "    type = submit  value = 提交 / >< / td >
      < / tr>
  < / table>
  < / form>