JS常用实例大全

每过1秒页面显示递增读秒

<body onload="timeCount()"> <span id="fps"></span> <script type="text/javascript"> var second=0; function timeCount(){ setTimeout("timeCount()",1000); second=second+1; document.getElementById('fps').innerHTML=second; } </script>

按下ESC键事件触发

<script> document.onkeydown = function(event){ if (event.keyCode == 27) { alert("按下了ESC键，键位值27"); } } </script>

勾选显示

<script> function sczs() { var value=document.getElementById("szchk").checked; if(value==true){ document.getElementById("a").style.display="inline-block"; }else{ document.getElementById("a").style.display="none"; } } </script> <input type="checkbox" id=szchk name="C1" value="ON" onchange="sczs()"> <div id=a style="display:none">123aaa</div>