JavaScript HTMLEncode function

Found this neat trick on another blog (http://lunarmedia.com/blogs/lunarmedia_blog/archive/2006/10/23/120405.aspx) to escape characters for presentation in HTML:

function escapeHTML (str)
{
   var div = document.createElement('div');
   var text = document.createTextNode(str);
   div.appendChild(text);
   return div.innerHTML;
}; 

How to resolve "__doPostBack is not defined" error

Thanks to Julien Pinquié:

When I ran across this, I found that I'd closed a <script> tag referring to an external .js file with /> notation instead of <script></script>; the <script> tag doesn't accept this notation for whatever reason.

JavaScript button disable with postback

When an ASP.NET server-side button is given client-side JavaScript code to execute when handling onclick, the button no longer posts back by default. However, there is a small piece of code you can add to the onclick attribute of the button to re-enable the postback behavior.

Adding this code in the Page_Load method will remove a server-side button's postback call:

btnConfirm.Attributes.Add("onclick", "Confirm_Click();")

But writing the code like this will reinstate the postback call:

btnConfirm.Attributes.Add("onclick", "Confirm_Click(); " + ClientScript.GetPostBackEventReference(btnConfirm, ""))