plus or add 1 every second

using JavaScript:

How can I plus 1 to value of this Input box every second.

<input type=text name=number value=1>

Use the setTimeout() function:

Code:

---

setTimeout("addone()", 30);

---

Where addone() is your function to add and 30 is the increment you wish to do it at.

Code:

---

<form name=tt>
<input type=text name=number value=1>
</form>

<SCRIPT language="JavaScript">
function Clock()
{
NO=tt.number.value+1;

tt.number.value=NO
}
ID=setTimeout("Clock()",1000)
</SCRIPT>

---

but it convert 1 to 11 and no effect after that.

I want to add 1 to value to become 2 and after one second become 3 ... 4 ...5 ...5