📄 ch21-284.html
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<HTML>
<HEAD>
<TITLE>综合篇--计算下载时间</TITLE>
</HEAD>
<BODY bgcolor="#fef4d2" >
<center>
<h2>综合篇--计算下载时间</h2>
<hr width=300>
<!-- 案例代码1开始 -->
<script language=JavaScript>
function DownloadTime(form, index){
for (i=1; i < 13; i++){
if (form.size.value==null||form.size.value.length==0){ form.size.value=0;}
if (form[i+"hour"].value==null||form[i+"hour"].value.length==0){ form[i+"hour"].value=0;}
if (form[i+"minute"].value==null||form[i+"minute"].value.length==0){ form[i+"minute"].value=0;}
if (form[i+"second"].value==null||form[i+"second"].value.length==0){ form[i+"second"].value=0;}
if (index != 0 && form.size.value != 0){
with (Math){
var speed = speedarray[i];
var TotalTime = ((form.size.value*index)/speed);
var TotalHours = floor((TotalTime/3600));
var TotalHoursMod = (TotalTime%3600);
var TotalMin = floor(TotalHoursMod/60);
var TotalMinMod = (TotalHoursMod%60);
var TotalSec = floor(TotalMinMod);
form[i+"hour"].value=TotalHours;
form[i+"minute"].value=TotalMin;
form[i+"second"].value=TotalSec; } } }
return;
}
function MakeArray(n) {
this.length = n;
for (var i = 1; i <= n; i++) { this[i] = 0 }
return this
}
speedarray = new MakeArray(11);
speedarray[1] = "1.1719"
speedarray[2] = "1.7578"
speedarray[3] = "3.5156"
speedarray[4] = "4.1016"
speedarray[5] = "6.8359"
speedarray[6] = "7.8125"
speedarray[7] = "16.6250"
speedarray[8] = "187.9883"
speedarray[9] = "1220.7031"
speedarray[10] = "3295.8984"
speedarray[11] = "5493.1641"
speedarray[12] = "18920.8984"
</script>
<!-- 案例代码1结束 -->
<!-- 案例代码2开始 -->
<form METHOD="POST" name="s">
<input type="hidden" name="8hour" value>
<input type="hidden" name="8minute" value>
<input type="hidden" name="8second" value>
<input type="hidden" name="9hour" value>
<input type="hidden" name="9minute" value>
<input type="hidden" name="9second" value>
<input type="hidden" name="10hour" value>
<input type="hidden" name="10minute" value>
<input type="hidden" name="10second" value>
<input type="hidden" name="11hour" value>
<input type="hidden" name="11minute" value>
<input type="hidden" name="11second" value>
<input type="hidden" name="12hour" value>
<input type="hidden" name="12minute" value>
<input type="hidden" name="12second" value>
<div align=center>
<!-- [Step1]: 这里可以设置表格的边界框 -->
<table border=2>
<tr>
<td>文件大小：
<!-- [Step2]: 在此能够修改文本框的列长度 -->
<input TYPE="TEXT" NAME="size" size=5>
<input TYPE="BUTTON" OnClick="DownloadTime(this.form, 1)" VALUE="KB">
<input TYPE="BUTTON" OnClick="DownloadTime(this.form, 1024)" VALUE="MB">
</td>
<script language=JavaScript>
document.s.size.focus();
</script>
<td colspan=3>
<div align="center">需要下载时间</div>
</td>
</tr>
<!-- [Step3]: 这里可以更改表格内容的对齐方式 -->
<tr align=center>
<td>调制解调器速率种类</td>
<td>时</td><td>分</td><td>秒</td>
</tr>
<tr align="center">
<td>9.6 Kb</td>
<td><input TYPE="TEXT" NAME="1hour" SIZE=5></td>
<td><input TYPE="TEXT" NAME="1minute" SIZE=5></td>
<td><input TYPE="TEXT" NAME="1second" SIZE=5></td>
</tr>
<tr align="center">
<td>14.4 Kb</td>
<td><input TYPE="TEXT" NAME="2hour" SIZE=5></td>
<td><input TYPE="TEXT" NAME="2minute" SIZE=5></td>
<td><input TYPE="TEXT" NAME="2second" SIZE=5></td>
</tr>
<tr align="center">
<td>28.8 Kb</td>
<td><input TYPE="TEXT" NAME="3hour" SIZE=5></td>
<td><input TYPE="TEXT" NAME="3minute" SIZE=5></td>
<td><input TYPE="TEXT" NAME="3second" SIZE=5></td>
</tr>
<tr align="center">
<td>33.6Kb</td>
<td><input type="TEXT" name="4hour" size=5></td>
<td><input type="TEXT" name="4minute" size=5></td>
<td><input type="TEXT" name="4second" size=5></td>
</tr>
<tr align="center">
<td>56 Kb</td>
<td><input TYPE="TEXT" NAME="5hour" SIZE=5></td>
<td><input TYPE="TEXT" NAME="5minute" SIZE=5></td>
<td><input TYPE="TEXT" NAME="5second" SIZE=5></td>
</tr>
</table>
</div>
</form>
<!-- 案例代码2结束 -->
</BODY>
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