Java Script Events and there Descriptions

Event	Description	Applicable on Controls
onAbort	When user cancel image loading	Image
onBlur	When control lost its Focus	Button, Checkbox, FileUpload, Layer, Password, Radio, Reset, Select, Submit, Text, TextArea, Window
onChange	Combo index change/Textbox data change	Text, TextArea, Select
onClick	Most useful event. Occur when user click on a button	Button, Checkbox, Link, Radio, Submit
onDblClick	When user double click on a Link	Link
onFocus	When an object get focus	Button, Checkbox, Radio, Reset, Select, Submit, Text, TextArea
onKeyDown	When the key is down means pressing time	Link, TextArea
onKeyPress	When user presses/holds a key	Link, TextArea
onKeyUp	When user release a key	Link, TextArea
onLoad	After completion of loading a page	Window, Image
onMouseDown	When mouse presses	Link, Button, Document
onMouseMove	When user moves the mouse	Link, Button, Document
onMouseOut	When user moves the mouse away from a object	Image, Link
onMouseOver	When user moves the mouse over a object	Image, Link
onMouseUp	When user release mouse	Document, Button, Link
onMove	When user moves the browser window or a frame	Document, Button, Link
onReset	By clicking on reset Button	Form
onResize	When user resizes the browser window or a frame	Window
onSelect	When user select text	Text, TextArea
onSubmit	When user clicks the submit button	Form
onUnload	When user leaves the page/close the browser	Window

Example onClick Event:


function clck()
{
// Code goes here
alert("Click event fired");
// Return false never make a post back to server.
// so one can add validation by using this concept. If return true then the page will be post back to server
return false;
}

Add the handler:

<asp:button runat="server" id="cmdOnClick" text="OnClientClick" onclientclick="return clck();">
<asp:button runat="server" id="cmdOnClick" text="OnClientClick" onclientclick="return clck();">
<input type="button" name="cmdHTML" value="HTML onClick" onclick="return clck();">