📄 ch6_examp6.htm

📁 javascript source code part1

💻 HTM

字号:

<HTML>
<HEAD>

<SCRIPT LANGUAGE=JavaScript>

var radCpuSpeedIndex = 0;

function radCPUSpeed_onclick(radIndex)
{
   var returnValue = true;

   if (radIndex == 1)
   {
      returnValue = false;
      alert("Sorry that processor speed is currently unavailable");
      document.form1.radCPUSpeed[radCpuSpeedIndex].checked = true;
   }
   else
   {
      radCpuSpeedIndex = radIndex;
   }
   return returnValue;
}

function butCheck_onclick()
{
   var controlIndex;
   var element;
   var numberOfControls = document.form1.length;
   var compSpec = "Your chosen processor speed is ";
   compSpec = compSpec + document.form1.radCPUSpeed[radCpuSpeedIndex].value;
   compSpec = compSpec + "\nWith the following addtional components\n";
   for (controlIndex = 0; controlIndex < numberOfControls; controlIndex++)
   {
      element = document.form1[controlIndex];
      if (element.type == "checkbox")
      {
         if (element.checked == true)
         {
            compSpec = compSpec + element.value + "\n";
         }
      }
   }
   alert(compSpec);
}

</SCRIPT>
</HEAD>
<BODY>

<FORM NAME=form1>
<P>
Tick all of the components you want included on your computer
<BR><BR>
<TABLE>
<TR>
   <TD>DVD-ROM</TD>
   <TD><INPUT TYPE="checkbox" NAME=chkDVD VALUE="DVD-ROM"></TD>
</TR>
<TR>
   <TD>CD-ROM</TD>
   <TD><INPUT TYPE="checkbox" NAME=chkCD VALUE="CD-ROM"></TD>
</TR>
<TR>
   <TD>Zip Drive</TD>
   <TD><INPUT TYPE="checkbox" NAME=chkZip VALUE="ZIP Drive"></TD>
</TR>
</TABLE>
<P>
Select the processor speed you require
<TABLE>
<TR>
   <TD><INPUT TYPE="radio" NAME=radCPUSpeed CHECKED 
      onclick="return radCPUSpeed_onclick(0)" VALUE="800 MHz"></TD>
   <TD>800 MHz</TD>
   <TD><INPUT TYPE="radio" NAME=radCPUSpeed 
      onclick="return radCPUSpeed_onclick(1)" VALUE="1 GHz"></TD>
   <TD>1 GHz</TD>
   <TD><INPUT TYPE="radio" NAME=radCPUSpeed 
      onclick="return radCPUSpeed_onclick(2)" VALUE="1.5 GHz"></TD>
   <TD>1.5 GHz</TD>
</TR>
</TABLE>
</P>
<INPUT TYPE="button" VALUE="Check Form" NAME=butCheck 
   onclick="return butCheck_onclick()">

</FORM>

</BODY>
</HTML>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -