加一个变量来记录它是否已经弹出过。
试一试:<script language=javascript>
var cancomeout=true;
</script>
<input type="button" name="Submit22" value="select" onClick="javascript:if(cancomeout){window.open('topselect.php?num=1');cancomeout=false;}">
试一试:<script language=javascript>
var cancomeout=true;
</script>
<input type="button" name="Submit22" value="select" onClick="javascript:if(cancomeout){window.open('topselect.php?num=1');cancomeout=false;}">
//三个参数分别为新窗口的文件路径(也可以是部分script函数);第二个参数是窗口名;第三个参数是窗口状态