javascript中setTimeout使用指南

<script>/*//方法1function slows(){  alert("15S后弹出！");}setTimeout("slows()",5000); //方法2function slows(){  alert("15S后弹出！");}setTimeout(slows,5000); *///方法3function slows(){  alert("15S后弹出！");}setTimeout(function(){slows()},5000); </script>