onclick="javascript : window.history.go(-1)";
//进入下一个页面
onclick="location.href='reg.aspx'";
//关闭窗口
onclick="javascript : window.colse();";
清空文本onclick="this.value="";
全选文本onclick="this.select();"
JS刷新
echo "<script language=JavaScript>alert('添加成功');location.replace(document.referrer);</script>"; //返回并刷新页面
location.replace(location.reload);//刷新当前页面
onkeyup="this.value=this.value.replace(/\D/g,'')" // 只能输入数字
//判断文本框非空
onclick="return checkform();";
<script type="text/javascript">
function checkform()
{
var name=document.getElementById("<%= txtname.ClientID %>").value;
if(name.length==0)
{alert("请输入用户名");return false;}
return true;
}
</script>
JS屏蔽网页中的错误提示信息
window.onerror = function () { return true; }
禁止网页复制的代码
document.oncontextmenu=new Function('event.returnValue=false;');
document.onselectstart=new Function('event.returnValue=false;');
添加到收藏夹和设为首页代码
<a style="cursor: pointer;" onclick="this.style.behavior='url(#default#homepage)';this.setHomePage(window.location.href);">设为首页</a>
<a style="cursor: pointer;" onclick="window.external.addFavorite(window.location.href,document.title)">加入收藏</a>
input搜索框中文字点击消失
input标签中的 onfocus="if(this.value=='在懒人建站搜索...'){this.value='';}" onblur="if(this.value==''){this.value='在懒人建站搜索...';}"
js不足位数补0
function padLeft(str, lenght) { //位数不足补0，length是位数 if (str.length >= lenght) return
str; else return padLeft("0" + str, lenght); }
//输出当时间和星期 方法一：
<script language="javascript" type="text/javascript">
function getCurDate() {
var d = new Date();
var week;
switch (d.getDay()) {
case 1: week = "星期一"; break;
case 2: week = "星期二"; break;
case 3: week = "星期三"; break;
case 4: week = "星期四"; break;
case 5: week = "星期五"; break;
case 6: week = "星期六"; break;
default: week = "星期天";
}
var years = d.getFullYear();
var month = add_zero(d.getMonth() + 1);
var days = add_zero(d.getDate());
var hours = add_zero(d.getHours());
var minutes = add_zero(d.getMinutes());
var seconds = add_zero(d.getSeconds());
var ndate = years + "年" + month + "月" + days + "日 " + hours + ":" + minutes + ":" + seconds + " " + week;
time.innerHTML = ndate;
}
function add_zero(temp) {
if (temp < 10) return "0" + temp;
else return temp;
}
setInterval("getCurDate()", 100);
</script>
今天是：<span id="time"></span>
//方法二
<script language="javascript" type="text/javascript">
window.onload = function () {
setInterval("document.getElementById('time').innerHTML=new Date().toLocaleString()+' 星期'+'日一二三四五六'.charAt(new Date().getDay());", 1000);
}
</script>