JavaScript Trim, LTrim, RTrim Functions using Regular Expressions

function jsTrim(stringToTrim)
{
return stringToTrim.replace(/^\s+\s+$/g,"");
}

function jsLtrim(stringToTrim)
{
return stringToTrim.replace(/^\s+/,"");
}

function jsRtrim(stringToTrim)
{
return stringToTrim.replace(/\s+$/,"");
}

Usage:
alert(jsTrim("     Webpage Tips     "));
alert(jsLtrim("     Webpage Tips"));
alert(jsRtrim("Webpage Tips     "));

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How to calculate download Speed using C#.net and Java Script code

Using C#.Net code

private void CalculateDownloadTime(double fileSizeMB,double fileSizeKB,int speed,ref int timeHour,ref int timeMinute,ref int timeSec)
{
double downloadTime = 0;

if (fileSizeMB != 0)
{
downloadTime = (fileSizeMB * Constant.FILE_SIZE_KB * 8.192) / speed;
}
else if (fileSizeKB != 0)
{
downloadTime = (fileSizeMB * 8.192) / speed;
}

timeHour = Convert.ToInt32(downloadTime) / 3600;
timeMinute = (Convert.ToInt32(downloadTime) % 3600) / 60;
timeSec = Convert.ToInt32(downloadTime) % 60;
}

Example to call above function:

int timeHour =0;
int timeMinute =0;
int timeMinute =0;
CalculateDownloadTime(30,0,56, ref timeHour, ref timeMinute, ref timeMinute);

Using Java Script

<script type="text/javascript">
var speeds = new Array(
 new Array("9.6 Modem", "9.6"),
 new Array("14.4 Modem", "14.4"),
 new Array("19.2 Modem", "19.2"),
 new Array("28.8 Modem", "28.8"),
 new Array("33.6 Modem", "33.6"),
 new Array("56 Kb Modem", "56"),
 new Array("Single Channel ISDN (64Kbps)", "64"),
 new Array("Dual Channel ISDN (128Kbps)", "128"),
 new Array("Asymmetric DSL (ADSL)", "384"),
 new Array("Single-pair HDSL (S-HDSL)", "768"),
 new Array("Consumer DSL (CDSL)", "1024"),
 new Array("T1", "1544"),
 new Array("HDSL", "1544"),
 new Array("T3", "46080"),
 new Array("Very high-speed DSL (VDSL)", "52224"),
 new Array("OC1", "53248"),
 new Array("100 Base-T (fast ethernet)", "102400"),
 new Array("ATM", "158720"),
 new Array("OC3", "159744"),
 new Array("1000 Base-T", "1024000")
);

function compute (form, scale)
{
 if (form.size == null form.size.length == 0)
 {
  alert("Please enter a valid filesize.");
  return;
 }

 var size = parseFloat(form.size.value);
 for (var i = 1; i <= speeds.length; i++)
 {
  var time = size * scale * 8.192 / speeds[i - 1][1];
  var hours = Math.floor(time / 3600);
  var minutes = Math.floor((time % 3600) / 60);
  var seconds = Math.floor(time % 60);
  form[i + "hour"].value = hours;
  form[i + "minute"].value = minutes;
  form[i + "second"].value = seconds;
 }
 
}
</script>  

Example to call above (compute) function:

For file Size MB --> compute(30,1024)
For file size KB --> compute(30,1)

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How to move web page division on mouse scroll

How to move web page division on mouse scroll (up/down)

Following code is an example to move left side portion of the web page on mouse scroll.

The division which you are going to move should be placed before java script; this code can implement in Java or .Net application, this java script function is compatible with Netscape, Mozilla and IE browsers.

Note: This code will activate only when you have horizontal scroll bar in your web page.

//Sample division to move
<div id="divTopLeft" style="position:absolute;left:10;top:200;width:167;">
<table border="1" width="159" height="550" bgcolor=Pink bordercolor="black" cellspacing="0" cellpadding="0">
<tr>
<td bordercolor="Pink">
<font color="blue">Your text should go here..</font>
</td>
</tr>
</table>
</div>
//Java script function to move above division up and down
<script type="text/javascript">
function FloatTopLeft()
{
//Set the start X and Y position for division
var startX = 622, startY = 220;
var ns = (navigator.appName.indexOf("Netscape") != -1);
var d = document;
var px = document.layers ? "" : "px";
function ml(id)
{
var el=d.getElementById?d.getElementById(id):d.all
?d.all[id]:d.layers[id];
if(d.layers)el.style=el
el.sP=function(x,y)
{
this.style.left=x+px;this.style.top=y+px;};
el.x = startX; el.y = startY;
return el;
}
window.stayTopLeft=function()
{
var pY = ns ? pageYOffset : document.documentElement && document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop;
var dY = (pY > startY) ? pY : startY;
ftlObj.y += (dY - ftlObj.y)/8 + 1;
ftlObj.sP(ftlObj.x, ftlObj.y);
setTimeout("stayTopLeft()", 20);
}
ftlObj = ml("divTopLeft");
stayTopLeft();
}
FloatTopLeft();
</script>

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