January 19th, 2009 
admin The setInterval() method evaluates a function or an expression repeatedly for the specified number of milliseconds and it returns an interval reference.
Syntax:
variable = setInterval(expression, milliseconds)
or
variable = setInterval(function, milliseconds)
variable holds the interval reference returned by seInterval method.
Example:
Below example display the current time information using setInterval method call the date object.
<html> <head> <title> setInterval Method Example </title> <script language="javascript"> function startSetInt() { ref=setInterval("init()",100); } function init() { dt = new Date(); document.getElementById("lbl").innerText = "Timer : " + dt; document.getElementById("btnStart").disabled = true; document.getElementById("btnStop").disabled = false; } function stopSetInt() { clearInterval(ref) document.getElementById("lbl").innerText = "Timer : "; document.getElementById("btnStart").disabled = false; document.getElementById("btnStop").disabled = true; } </script> </head> <body onload="startSetInt()"> <label id="lbl" name="lbl"></label> </br> </br> <input type="button" id="btnStart" value="Start" onclick="startSetInt()" /> <input type="button" id="btnStop" value="Stop" onclick="stopSetInt()" /> </body> </html>
Demo : Click here
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