<HTML>
<HEAD>
<TITLE></TITLE>
<SCRIPT>
var intervalID=0;
function f_start(){
intervalID=window.setInterval("f_add()",500);
}
function f_add(){
var obj=document.getElementById("spanTest");
var val=parseInt(obj.innerHTML);
if (val.toString()=="NaN") val=0;
val++;
obj.innerHTML=val;
}
function f_stop(){
window.clearInterval(intervalID);
}
</SCRIPT>
</HEAD>
<BODY onload="f_start()"><span id="spanTest"></span>
<input type=button value="stop" onclick="f_stop()">
</BODY>
</HTML>
<HEAD>
<TITLE></TITLE>
<SCRIPT>
var intervalID=0;
function f_start(){
intervalID=window.setInterval("f_add()",500);
}
function f_add(){
var obj=document.getElementById("spanTest");
var val=parseInt(obj.innerHTML);
if (val.toString()=="NaN") val=0;
val++;
obj.innerHTML=val;
}
function f_stop(){
window.clearInterval(intervalID);
}
</SCRIPT>
</HEAD>
<BODY onload="f_start()"><span id="spanTest"></span>
<input type=button value="stop" onclick="f_stop()">
</BODY>
</HTML>
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