CODE EXAMPLE FOR JAVASCRIPT

js settimeout

<input type="text" id="displayBox" name="displayBox" value="0">
 
<script>
x = 0
function countSecond() 
{　
    x = x+1
    document.getElementById("displayBox").value=x 
    setTimeout("countSecond()", 1000)
}
// 执行函数
countSecond()
</script>