学习使用setTimeout()

<SCRIPT>
var i=0;
function fnHide(oToHide){
window.setTimeout("fnHide2(" + oToHide.id + ")", 3000);
}
function fnHide2(sID){
var o = eval(sID);
o.style.display="none";
window.setTimeout("showAgain()",1000);
}
function showAgain(id){
document.getElementById("oHideButton").style.display="inline";
i++;
if(i%2==0){
document.getElementById("oHideButton").value="已经改变";
}else{
document.getElementById("oHideButton").value="恢复原样";
}
}
</SCRIPT>
<INPUT TYPE=button VALUE="Press Down" ID="oHideButton" onclick="fnHide(this)">