var isIE = document.all?true:false;
var isNS = document.layers?true:false;

function onlyDigits(e,decReq) {
var key = (isIE) ? window.event.keyCode : e.which;
var obj = (isIE) ? event.srcElement : e.target;
var isNum = (key > 47 && key < 58) ? true:false;
var dotOK = (key==46 && decReq==’decOK’ && (obj.value.indexOf(“.”)<0 || obj.value.length==0)) ? true:false;
if(key < 32)
return true;
return (isNum || dotOK);
}

if((myList.options[myList.selectedIndex].text==”–Select–”))
{
alert(“Please select home page category.”);
myList.focus();
return false;
}

I want you to take a look at: Disable Mouse RightClick 

</script>

OnClientClick=”javascript:return deletedata()”

Page.ClientScript.RegisterStartupScript(Page.GetType(), “MyScript”, “<script language=javascript>window.opener.location.reload();</script>”);

Cheat sheet

<%= String.Format(“{specifier}”, DateTime.Now) %>

ViewState["sortdirection"] = “asc”; protected void grdMember_Sorting(object sender, GridViewSortEventArgs e)

{

ViewState["sortexpression"] = e.SortExpression.ToString();

if (ViewState["sortdirection"].ToString() == “asc”)

{

ViewState["sortdirection"] = “desc”;

}

else

{

ViewState["sortdirection"] = “asc”;

}

}

protected void grdMember_Sorted(object sender, EventArgs e)

{

string sql = “select * from members order by ” + ViewState["sortexpression"].ToString() + ” ” + ViewState["sortdirection"].ToString(); BindConsumerGrid(sql);

}

function reEnable()
{
return true
}

//if IE4+
document.onselectstart = new Function (“return false”)

//if NS6+
if (window.sidebar)
{
document.onmousedown = disableselect
document.onclick = reEnable
}
</script>

<script type=”text/javascript”>
//Disable right click script
//It works for both firefox and internet explorer
var message=”";

function clickIE() {if (document.all) {(message);return false;}}
function clickNS(e) {if
(document.layers||(document.getElementById&&!document.all)) {
if (e.which==2||e.which==3) {(message);return false;}}}
if (document.layers)
{document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;}
else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;}

document.oncontextmenu=new Function(“return false”)
</script>

2. Basic No-Right-Click Script
============================================================
Script: Basic No-Right-Click Script
Functions: Blocks right-click on mouse and shows alert box
Browsers: NS & IE 4.0 & later; degrades gracefully
Author: etLux
============================================================

Put the following script in the head of your page:

Code:
<script language=”Javascript1.2″>

// (C) 2003 CodeLifter.com
// Source: CodeLifter.com
// Do not remove this header

// Set the message for the alert box
am = “This function is disabled!”;

// do not edit below this line
// ===========================
bV  = parseInt(navigator.appVersion)
bNS = navigator.appName==”Netscape”
bIE = navigator.appName==”Microsoft Internet Explorer”

function nrc(e) {
if (bNS && e.which > 1){
alert(am)
return false
} else if (bIE && (event.button >1)) {
alert(am)
return false;
}
}

document.onmousedown = nrc;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (bNS && bV<5) window.onmousedown = nrc;

</script>

============================================================

3. No right click
Code:
<SCRIPT language=JavaScript>
<!– http://www.spacegun.co.uk –>
var message = “function disabled”;
function rtclickcheck(keyp){ if (navigator.appName == “Netscape” && keyp.which == 3){     alert(message); return false; }
if (navigator.appVersion.indexOf(“MSIE”) != -1 && event.button == 2) {     alert(message);     return false; } }
document.onmousedown = rtclickcheck;
</SCRIPT>