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50个js技巧（分享）
1.文本框焦点问题
onBlur:当失去输入焦点后产生该事件
onFocus:当输入获得焦点后，产生该文件
Onchange:当文字值改变时，产生该事件
Onselect:当文字加亮后，产生该文件
<input type="text" value="mm" onfocus="if(value=http://www.mamicode.com/=‘mm) " onblur="if(value=http://www.mamicode.com/=‘‘) {value=‘mm‘}">
点击时文字消失，失去焦点时文字再出现
2.网页按钮的特殊颜色
<inputtype=buttonname="Submit1" value="郭强" size=10class=s02style="background-color:rgb(235,207,22)">
3.鼠标移入移出时颜色变化
<inputtype="submit" value="找吧" name="B1" onm ouseOut=this.style.color="blue"onMouseOver=this.style.color="red"class="button">
4.平面按钮
<inputtype=submitvalue=订阅 style="border:1px solid :#666666; height:17px; width:25pt; font-size:9pt;BACKGROUND-COLOR: #E8E8FF; color:#666666" name="submit">
5.按钮颜色变化
<inputtype=text name="nick" style="border:1px solid #666666; font-size:9pt; height:17px;BACKGROUND-COLOR: #F4F4FF; color:#ff6600" size="15" maxlength="16">
6.平面输入框
<inputtype="text" name="T1" size="20" style="border-style: solid; border-width: 1">
7.使窗口变成指定的大小
<script>window.resizeTo(300,283);</script>
8.使文字上下滚动
<marqueedirection=upscrollamount=1scrolldelay=100onmouseover=‘this.stop()‘onmouseout=‘this.start()‘height=60>
<!-- head_scrolltext -->
<tr>
<td>共和国
</table><!-- end head_scrolltext-->
</marquee>
9.状态栏显示该页状态
<baseonmouseover="window.status=‘网站建设 http://www.webmake.cn/‘ ;return true">
10.可以点击文字实现radio选项的选定
<br>
<inputtype="radio" name="regtype" value="A03" id="A03"><labelfor="A03"> 情侣 : 一次注册两个帐户</label><br>
11.可以在文字域的font写onclick事件
12.打印</a>打印网页
<a href=‘javascript:window.print()‘>
13.线型输入框
<inputtype="text" name="key" size="12" value="关键字" onFocus=this.select()onMouseOver=this.focus()class="line">
14.显示文档最后修改日期
<scriptlanguage=javascript>function hi(str){ document.write(document.lastModified) alert("hi"+str+"!")}</script>
15.可以在鼠标移到文字上时就触发事件
<html>
<head>
<scriptlanguage="LiveScript">
<!-- Hiding function hello() { alert("哈罗!"); }
</script>
</head>
<body>
<ahref="" onm ouseOver="hello()">link</a>
</body>
</html>
16.可以根据网页上的选项来确定页面颜色
<HTML>
<HEAD>
<TITLE>background.html</TITLE>
</HEAD>
<SCRIPT>
<!--function bgChange(selObj) {
newColor = selObj.options[selObj.selectedIndex].text; document.bgColor= newColor; selObj.selectedIndex=-1;
}//-->
</SCRIPT>
<BODYSTYLE="font-family:Arial">
<B>Changing Background Colors</B>
<BR>
<FORM>
<SELECT SIZE="8" onChange="bgChange(this);">
<OPTION>Red<OPTION>
<OPTION>Yellow<OPTION>
<OPTION>Blue<OPTION>
<OPTION>Violet<OPTION>
<OPTION>pink<OPTION>
</SELECT>
</FORM>
</BODY>
</HTML>
17.将按钮的特征改变
<styletype="text/css">
<!--.style1{
font-size: 12px; background: #CCCCFF; border-width: thin thin thin thin; border-color: #CCCCFF#CCCCCC #CCCCCC #CCCCFF
}
.style2{
font-size: 12px; font-weight: bold; background: #CCFFCC; border-width: thin medium medium thin;border-color: #CCFF99 #999999 #999999 #CCFF99
}--></style>
本例按钮的代码如下：
<inputtype="submit" name="Submit" value="提 交" onm ouseover="this.className=‘style2‘"onmouseout="this.className=‘style1‘" class="style1">
18.改变按钮的图片.
<styletype="text/css">
<!--.style3{
font-size: 12px; background: url(image/buttonbg1.gif); border: 0px; width: 60px; height: 22px
}
.style4{
font-size: 12px; font-weight: bold; background: url(image/buttonbg2.gif); border: 0px 0; width:60px; height: 22px
}-->
</style>
本例的按钮代码如下：
<inputtype="submit" name="Submit2" value="提 交" onm ouseover="this.className=‘style4‘"onmouseout="this.className=‘style3‘" class="style3">
19.打印页面<divalign="center"><aclass=contenthref="javascript:doPrint();">打印本稿</a></div>
20.可以直接写html语言document.write("");
21.改变下拉框的颜色
<selectname="classid"onChange="changelocation(document.myform.classid.options[document.myform.classid.selectedIndex].value)"size="1" style="color:#008080;font-size: 9pt">
22.转至目标URL
window.location=http://guoguo
23.传递该object的formUpdateSN(‘guoqiang99267‘,this.form)function UpdateSN(strValue,strForm){ strForm.SignInName.value = http://www.mamicode.com/strValue; return >
24.文字标签
<labelfor="AltName4">
<inputname="AltName" type="RADIO" tabindex="931" id="AltName4">guoqiang99859
</label>
25.layer2为组件的ID，可以控制组件是否可见
document.all.item(‘Layer2‘).style.display = "block";document.all.item(‘Layer2‘).style.display = "none";//
26.将页面加入favorite中
<scriptlanguage=javascript>
<!--function Addme(){
url ="http://your.site.address";//你自己的主页地址title="Your Site Name";//你自己的主页名称window.external.AddFavorite(url,title);-->
</script>//
27.过10秒自动关闭页面
< scriptlanguage="JavaScript">function closeit() {
setTimeout("self.close()"，10000)
}
< /script>
28.可以比较字符的大小
char=post.charAt(i);if(!(‘0‘<=char&&char<=‘9‘))
29.将字符转化为数字month = parseInt(char)
30.点击value非空的选项时转向指定连接
<select onchange=‘if(this.value!="")window.open(this.value)‘class="textinput">
<option selected>主办单位</option>
<option>-----------------</option>
<option value="http://www.bjd.com.cn/">北京日报</option>
<option value="http://www.ben.com.cn/">北京晚报</option>
</select>
31.改变背景颜色
<tdwidth=* class=dp bgColor=#FAFBFConmouseover="this.bgColor=‘#FFFFFF‘;"onmouseout="this.bgColor=‘#FAFBFC‘;">
32.改变文字输入框的背景颜色
<style>
.input2{background-image: url(‘../images/inputbg.gif‘); font-size: 12px; background-color:#D0DABB;border-top-width:1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px
}
</style>
<inputname=contenttype=text size="47" class="input2" maxlength="50">
33.改变水平线的特征
<hrsize="0" noshade color="#C0C0C0">
34.传递参数的方式
<ahref="vote.asp?CurPage=8&id=3488">8</a>
35.页内跳转
<a href="#1">1</a>
<ahref="#2">2</a>
<ahref="#3">3</a>
<ahref="#4">4</a>
<ahref="#5">5</a>
<ahref="#6">6</a>
<ahref="#7">7</a>
<aname="1">dfdf</a>
<aname="2">dfdf</a>//
36.两个按键一起按下
if(event.ctrlKey && window.event.keyCode==13)//
37.刷新页面
javascript:this.location.reload()//
38.将网页的按钮使能
<SCRIPTLANGUAGE="JavaScript">
function haha(){
for(var i=0;i<document.form1.elements.length;i++) {
if(document.form1.elements[i].name.indexOf("bb")!=-1)
document.form1.elements[i].disabled=!document.form1.elements[i].disabled;
}
}
</SCRIPT>
<BODY>
<formname=form1>
<INPUTTYPE="button" NAME="aa " value=cindyonclick=haha()>
<INPUTTYPE="button" NAME="bb " value=guoguo>
<INPUTTYPE="button" NAME="bb " value=guoguo>
39.文字移动
<marqueescrollamount=3onmouseover=this.stop();onmouseout=this.start();>
40.双击网页自动跑
<SCRIPTLANGUAGE="JavaScript">
var currentpos,timer;function initialize(){
timer=setInterval("scrollwindow()",1);
}
function sc(){
clearInterval(timer);
}function scrollwindow(){
currentpos=document.body.scrollTop; window.scroll(0,++currentpos);
if (currentpos!= document.body.scrollTop) sc();
}document.onmousedown=scdocument.ondblclick=initialize</SCRIPT>//
41.后退<INPUTTYPE="button" onclick=window.history.back()value=back>
42.前进<INPUTTYPE="button" onclick=window.history.forward()value=forward>
43.刷新<INPUTTYPE="button" onclick=document.location.reload()value=reload>
44.转向指定网页
document.location="http://ww"或者document.location.assign(http://guoguo.com)
45.在网页上显示实时时间
<SCRIPTLANGUAGE="JavaScript">var clock_id;window.onload=function(){ clock_id=setInterval("document.form1.txtclock.value=http://www.mamicode.com/(new >",1000)}</SCRIPT>//
46.可以下载文件document.location.href="http://www.mamicode.com/目标文件"//
47.连接数据库
import java.sql.*;String myDBDriver="sun.jdbc.odbc.JdbcOdbcDriver";Class.forName(myDBDriver);Connection conn=DriverManager.getConnection("jdbc:odbc:firm","username","password");Statement stmt=conn.createStatement();ResultSet rs=stmt.executeQuery(sql);rs.getString("column1");//
48.可以直接在页面“div”内写下所需内容
<INPUTTYPE="button" onclick="a1.innerHTML=‘<font color=red>*</font>‘"><divid=a1></div>//
49.可以改变页面上的连接的格式，使其为双线<style>
A:link {text-decoration: none; color:#0000FF; font-family: 宋体}
A:visited {text-decoration: none; color: #0000FF; font-family: 宋体}
A:hover {text-decoration: underline overline; color: FF0000}
</style>
<style>
A:link {text-decoration: none; color:#0000FF; font-family: 宋体}
A:visited {text-decoration: none; color: #0000FF; font-family: 宋体}
A:hover {text-decoration: underline overline line-through; color: FF0000}
TH{FONT-SIZE: 9pt}TD{FONT-SIZE: 9pt}
body {SCROLLBAR-FACE-COLOR:#A9D46D;
SCROLLBAR-HIGHLIGHT-COLOR: #e7e7e7;
SCROLLBAR-SHADOW-COLOR:#e7e7e7;
SCROLLBAR-3DLIGHT-COLOR: #000000;
LINE-HEIGHT: 15pt;
SCROLLBAR-ARROW-COLOR: #ffffff;
SCROLLBAR-TRACK-COLOR: #e7e7e7;
}
INPUT{
BORDER-TOP-WIDTH: 1px;
PADDING-RIGHT: 1px;
PADDING-LEFT: 1px;
BORDER-LEFT-WIDTH: 1px;
FONT-SIZE:9pt;
BORDER-LEFT-COLOR: #cccccc;
BORDER-BOTTOM-WIDTH: 1px;
BORDER-BOTTOM-COLOR: #cccccc;
PADDING-BOTTOM: 1px;
BORDER-TOP-COLOR: #cccccc;
PADDING-TOP: 1px; HEIGHT: 18px;
BORDER-RIGHT-WIDTH: 1px;
BORDER-RIGHT-COLOR: #cccccc
}
DIV,form ,OPTION,P,TD,BR{
FONT-FAMILY: 宋体; FONT-SIZE: 9pt
}
textarea, select{
border-width: 1;
border-color: #000000;
background-color: #efefef;
font-family: 宋体;font-size: 9pt;
font-style: bold;
}
.text{ font-family: "宋体";
font-size: 9pt;
color: #003300;
border: #006600 solid;
border-width: 1px 1px1px 1px
}
</style>
完整的css
50.新建frame<ahref="javascript:newframe(‘http://www.163.net/help/a_little/index.html‘,‘http://www.163.net/help/a_little/a_13.html‘)"><imgalt=帮助 border=0 src="http://bjpic.163.net/images/mail/button-help.gif"></a>