请教一个复选框的问题！

解决方案 »

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在文本框中编程实现，onFocus里设置它的color ,及大小
<input type=checkbox
onclick="txt1.style.color=(txt1.style.color=='#000000')?'#ff0000':'#000000';txt1.style.fontSize=(txt1.style.fontSize=='12pt')?'9pt':'12pt';">
<input type=text value="test" id=txt1 style="color:#000000;font-size:12pt;">
<input id=xx type=checkbox onselect="sw()"><input id=ss>
<script>
function sw(){
if(xx.selected==true)
document.all.ss.style.color="red";
document.all.ss.style.fontSize="14pt";
}
else{
document.all.ss.style.color="black";
document.all.ss.style.fontSize="9pt";}
</script>
<html>
<body >
<input id=pp type=text value=exam>color:<input type=checkbox value=red onclick="if(this.checked==true) pp.style.color='red'; else pp.style.color='black' ">size:<input type=checkbox vlaue=20 onclick="if(this.checked==true) pp.style.fontSize='20'; else pp.style.fontSize='14'">
</body>
</html>
最好写成函数
<script language="JavaScript">

</script>
<form name=frm>
<input type="text" name="test">
<input type="checkbox" onclick="chg('test',this,'fontSize','15pt')">
<input type="checkbox" onclick="chg('test',this,'color','red')">
<input type="checkbox" onclick="chg('test',this,'backgroundColor','yellow')">
</form>
测试成功的代码：
<html>
<head>
<title>Untitled Document</title>
<script language="JavaScript">
function ddd(ss)
{
  alert(ss)
  if (ss=='color')
  {
  document.changestyle.text1.style.color=document.changestyle.color1.value;
  return;
  }
  if (ss=='size')
  {
    document.changestyle.text1.style.fontSize=document.changestyle.size1.value;
    return;
  }
}
</script>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<form name="changestyle" method="post" action="">
  <input type="text" name="text1">
  大小
  <select name="size1" onchange="ddd('size')">
    <option value="10px">10px</option>
    <option value="11px">11px</option>
    <option value="12px">12px</option>
    <option value="13px">13px</option>
    <option value="14px">14px</option>
  </select>
  颜色
  <select name="color1" onchange="ddd('color')">
  <option value="red">red</option>
  <option value="blue">blue</option>
  <option value="yellow">yellow</option>
</select>
</form>
</body>
</html>
http://www.csdn.net/cnshare/soft/5/5819.shtm
<html><head><title>New Page 1</title>
</head><body><form method="POST" action="">

  <p><input type="text" name="t1" size="20">
  <input type="checkbox" name="C1" value="ON" onclick="if(this.checked){t1.style.color='red'} else{t1.style.color='black'}">red 
  <input type="checkbox" name="C2" value="ON">green</p>
</form></body></html>
<html><head><title>New Page 1</title>
</head><body><form method="POST" action="">

  <p><input type="text" name="t1" size="20">
  <input type="checkbox" name="C1" value="ON" onclick="if(this.checked){t1.style.color='red'} else{t1.style.color='black'}">red 
  <input type="checkbox" name="C2" value="ON" onclick="if(this.checked){t1.style.fontSize='18'} else{t1.style.fontSize='15'}">18px</p>
</form></body></html>