how to modify javascript based on c# variable

Question

I only want to modify the javascript based on below requirement-

when the train is arrived, blink should start before 2 minute of arrival and when the train is departed, blink should continue till 2 mintue after departur.

Im getting "arrival time" and "departure time" from below code:

public partial class abc

{

public string arrival;

public string departure;

protected override void Display()

{

arrival = "14:06"; // arrival time is coming in this format


departure = "14:10"; //departure time is coming in this format


}

}

Java script I am using is:

<script type="text/javascript" language="javascript">

function doBlink() {

var blink = document.all.tags("BLINK")

for (var i = 0; i < blink.length; i++)

blink[i].style.visibility = blink[i].style.visibility == "" ? "hidden" : ""

}

function startBlink() {

if (document.all && !isTimerInstalled)

setInterval("doBlink()", 1000);

isTimerInstalled = true;

}

</script>

Please reply how to modify my javascript based on requirement.

Please help