startday = new Date();
clockStart = startday.getTime();
function initStopwatch() { 
var myTime = new Date(); 
var timeNow = myTime.getTime();  
var timeDiff = timeNow - clockStart; 
this.diffSecs = timeDiff/1000; 
return(this.diffSecs); 
} 
function getSecs() { 
var mySecs = initStopwatch(); 
var mySecs1 = ""+mySecs; 
mySecs1= mySecs1.substring(0,mySecs1.indexOf(".")); 
document.forms[0].timespent.value = mySecs1 
window.setTimeout('getSecs()',1000); }