function stp()
{
var mar=document.getElementById("myMark");
mar.stop();
}
function srt()
{
var mar=document.getElementById("myMark");
mar.start();
}



function stp1()
{
var mar1=document.getElementById("myMark1");
mar1.stop();
}
function srt1()
{
var mar1=document.getElementById("myMark1");
mar1.start();
}