Определение времени загрузки страницы
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Код:
<html>
<title>JavaScript. Определение времени загрузки страницы</title>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function MakeArray(n) {
this.length = n;
for (var i = 1; i <= n; i++) {
this[i] = 0 }
return this
}
speedVar = new MakeArray(11);
speedVar[1] = "1.1719"
speedVar[2] = "1.7578"
speedVar[3] = "3.5156"
speedVar[4] = "6.8359"
speedVar[5] = "7.8125"
speedVar[6] = "16.6250"
speedVar[7] = "187.9883"
speedVar[8] = "1220.7031"
speedVar[9] = "3295.8984"
speedVar[10] = "5493.1641"
speedVar[11] = "18920.8984"
function compute(form, mult){
for (i=1; i < 12; 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 (mult != 0 && form.size.value != 0){
with (Math){
var speed = speedVar[i];
var TotalTime = ((form.size.value*mult)/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;
}
// End -->
</SCRIPT>
</head>
<body bgcolor="000000" text="#00ff99" link="#00ff00" alink="#99ff00" vlink="#00cc00">
<FORM METHOD="POST">
<CENTER>
<TABLE BORDER="1">
<TR>
<TD><em>Размер файла?</em>
<INPUT TYPE="TEXT" NAME="size" SIZE="10">
<INPUT style="color: #00cc00; background-color: #000000; border-color: #00cc00;" TYPE="BUTTON" OnClick="compute(this.form, 1)" VALUE="KB">
<INPUT style="color: #00cc00; background-color: #000000; border-color: #00cc00;" TYPE="BUTTON" OnClick="compute(this.form, 1024)" VALUE="MB">
</TD>
<TD colspan="3"><center><strong>Время загрузки</strong></CENTER>
</TD>
</TR>
<TR>
<TH><strong>Скорость модема</strong></TH>
<TH><strong>Часы</strong></TH>
<TH><strong>Минуты</strong></TH>
<TH><strong>Секунды</strong></TH>
</TR>
<TR>
<TD><strong>9.6 Kb</strong></TD>
<TD><INPUT TYPE="TEXT" NAME="1hour" SIZE="6"></TD>
<TD><INPUT TYPE="TEXT" NAME="1minute" SIZE="6"></TD>
<TD><INPUT TYPE="TEXT" NAME="1second" SIZE="6"></TD>
</TR>
<TR>
<TD><strong>14.4 Kb</strong></TD>
<TD><INPUT TYPE="TEXT" NAME="2hour" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="2minute" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="2second" SIZE="6"></TD>
</TR>
<TR>
<TD><strong>28.8 Kb</strong></TD>
<TD><INPUT TYPE="TEXT" NAME="3hour" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="3minute" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="3second" SIZE="6"></TD>
</TR>
<TR>
<TD><strong>56 Kb</strong></TD>
<TD><INPUT TYPE="TEXT" NAME="4hour" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="4minute" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="4second" SIZE="6"></TD>
</TR>
<TR>
<TD><strong>ISDN (64 Kb)</strong></TD>
<TD><INPUT TYPE="TEXT" NAME="5hour" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="5minute" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="5second" SIZE="6"></TD>
</TR>
<TR>
<TD><strong>ISDN (128 Kb)</strong></TD>
<TD><INPUT TYPE="TEXT" NAME="6hour" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="6minute" SIZE="6"> </TD>
<TD><INPUT TYPE="TEXT" NAME="6second" SIZE="6"></TD>
</TR>
<TR>
<TD ></TD>
<TD><INPUT TYPE="HIDDEN" NAME="7hour" SIZE="6"></TD>
<TD><INPUT TYPE="HIDDEN" NAME="7minute" SIZE="6"></TD>
<TD><INPUT TYPE="HIDDEN" NAME="7second" SIZE="6"></TD>
</TR>
<INPUT TYPE="HIDDEN" NAME="8hour" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="8minute" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="8second" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="9hour" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="9minute" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="9second" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="10hour" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="10minute" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="10second" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="11hour" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="11minute" SIZE="6">
<INPUT TYPE="HIDDEN" NAME="11second" SIZE="6">
</TABLE>
</FORM>
</CENTER><br>При расчете не учитываются картинки, поэтому для определения реального времени загрузки страници пользователю, необходимо вначале сложить размер всех подгружаемых файлов. При этом цифра будет точной если только на странице не имеется байнеров других сайтов.
</body>
</html>