javascript 收集 - 润新知

javascript 收集

ENTER键可以让光标移到下一个输入框

<input onkeydown='if(event.keyCode==13)event.keyCode=9' >

只能是中文 <input onkeyup='value=value.replace(/[ -~]/g,'')' onkeydown='if(event.keyCode==13)event.keyCode=9'>

只能是英文和数字.屏蔽了输入法 <input style='ime-mode:disabled' onkeydown='if(event.keyCode==13)event.keyCode=9'>

只能输入英文和数字 <input onkeyup='value=value.replace(/[\W]/g,'') 'onbeforepaste='clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))' onkeydown='if(event.keyCode==13)event.keyCode=9'>

只能是数字 <input onkeyup='value=value.replace(/[^\d]/g,'') 'onbeforepaste='clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))'>

只能显示，不能修改的文本框 <input readOnly value='只能显示，不能修改'>

*************************************************************

只能是数字,判断按键

程序代码：<script language=javascript>
function onlyNum()
{
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)||(event.keyCode==8)))
event.returnValue=false;
}
</script>
<input onkeydown='onlyNum();'>

*************************************************************

附：获取键盘的KeyCode

程序代码：<html>
<head>
<script language='javascript'>
ns4 = (document.layers) ? true : false;
ie4 = (document.all) ? true : false;
function keyDown(e){
if(ns4){
var nkey=e.which;
var iekey='现在是ns浏览器';
var realkey=String.fromCharCode(e.which);
}
if(ie4){
var iekey=event.keyCode;
var nkey='现在是ie浏览器';
var realkey=String.fromCharCode(event.keyCode);
if(event.keyCode==32){realkey='\' 空格\''}
if(event.keyCode==13){realkey='\' 回车\''}
if(event.keyCode==27){realkey='\' Esc\''}
if(event.keyCode==16){realkey='\' Shift\''}
if(event.keyCode==17){realkey='\' Ctrl\''}
if(event.keyCode==18){realkey='\' Alt\''}
}
alert('ns浏览器中键值:'+nkey+'\n'+'ie浏览器中键值:'+iekey+'\n'+'实际键为'+realkey);
}
document.onkeydown = keyDown;
if(ns4){
document.captureEvents(Event.KEYDOWN);}
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>请按任意一个键。。。。</h3>
</center>
</body>
</html>

限制网页用键盘

程序代码：

<body onkeydown='alert('禁用');return false;'>

限制键盘的某个键：body onkeydown='if(event.keyCode==num){alert('禁用');return false;}

再加个找按键的值

程序代码：<script>
function show(){
alert('ASCII代码是：'+event.keyCode);
}
</script>
<body onkeydown='show()'>

*************************************************************

只能是IP地址

程序代码：<html>

<head>
<meta http-equiv='Content-Type' content='text/html; charset=gb2312'>
<meta name='GENERATOR' content='Microsoft FrontPage 4.0'>
<meta name='ProgId' content='FrontPage.Editor.Document'>
<style>
.a3{}{width:30;border:0;text-align:center}
</style>
<script>
function mask(obj){
obj.value=obj.value.replace(/[^\d]/g,'')
key1=event.keyCode
if (key1==37 || key1==39)
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))
nextip=key1==37?nextip-1:nextip+1;
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval('ip'+nextip+'.focus()')
}
if(obj.value.length>=3)
if(parseInt(obj.value)>=256 || parseInt(obj.value)<=0)
{
alert(parseInt(obj.value)+'IP地址错误！')
obj.value=''
obj.focus()
return false;
}
else
{ obj.blur();
nextip=parseInt(obj.name.substr(2,1))+1
nextip=nextip>=5?1:nextip
nextip=nextip<=0?4:nextip
eval('ip'+nextip+'.focus()')
}
}
function mask_c(obj)
{
clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))
}

</script>
<title>IP地址输入</title>

</head>
<body>IP地址输入
<div style='border-1;border-color:balck;border-style:solid;165;font-size:9pt'>
<input type=text name=ip1 maxlength=3 class=a3 onkeyup='mask(this)' onbeforepaste=mask_c()>.
<input type=text name=ip2 maxlength=3 class=a3 onkeyup='mask(this)' onbeforepaste=mask_c()>.
<input type=text name=ip3 maxlength=3 class=a3 onkeyup='mask(this)' onbeforepaste=mask_c()>.
<input type=text name=ip4 maxlength=3 class=a3 onkeyup='mask(this)' onbeforepaste=mask_c()>
</div>
</body>

</html>

*************************************************************

用#default#savehistory防止后退清空text文本框

程序代码：
<HTML>
<HEAD>
<META NAME='save' CONTENT='history'>
<STYLE>
.saveHistory {}{behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=saveHistory type=text id=oPersistInput>
<input type=button onclick='javascript:location.href='http://www.cnbruce.com/red/'' value='点击进入,再按后退键试试？'>
</BODY>
</HTML>

*************************************************************

TEXTAREA自适应文字行数的多少

程序代码：

<textarea rows=1 name=s1 cols=27 onpropertychange='this.style.posHeight=this.scrollHeight'>

*************************************************************

上传预览图片

程序代码：<img id=pic src=http://www.cnbruce.com/images/logo.gif>
<input type=file name=file><input type=button onclick=pic.src=file.value value=预览图片>
<input type=button onclick=alert(file.value) value=图片地址>
<input type=button onclick='file.outerHTML=file.outerHTML.replace(/value=\w/g,'')' value='清除file里字'>

*************************************************************

去掉下拉选项的边框

程序代码：<div style='position: absolute; left: 10px; top: 10px; 115px; height: 20px; clip:rect(2 114 20 2);'>
<select>
<option >cnpeople</option>
<option >cnrose</option>
<option >cnbruce</option>
</select>
</font>
</div>

*************************************************************

下拉列表打开窗口

程序代码：
<select onChange='if(this.selectedIndex && this.selectedIndex!=0){window.open(this.value);}this.selectedIndex=0;'>
<option selected>更多链接……</option>
<option value='http://www.cnbruce.com'>cnbruce</option>
<option value='http://daonet.myrice.com/old/'>daonet</option>
<option value='http://www.blueidea.com'>blue!dea
</select>

*************************************************************

TAB的显示

程序代码：<script> function editTab() { var code, sel, tmp, r var tabs='' event.returnValue = false sel =event.srcElement.document.selection.createRange() r = event.srcElement.createTextRange() switch (event.keyCode) { case (8) : if (!(sel.getClientRects().length > 1)) { event.returnValue = true return } code = sel.text tmp = sel.duplicate() tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top) sel.setEndPoint('startToStart', tmp) sel.text = sel.text.replace(/^\t/gm, '') code = code.replace(/^\t/gm, '').replace(/\r\n/g, '\r') r.findText(code) r.select() break case (9) : if (sel.getClientRects().length > 1) { code = sel.text tmp = sel.duplicate() tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top) sel.setEndPoint('startToStart', tmp) sel.text = '\t'+sel.text.replace(/\r\n/g, '\r\t') code = code.replace(/\r\n/g, '\r\t') r.findText(code) r.select() } else { sel.text = '\t' sel.select() } break case (13) : tmp = sel.duplicate() tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top) tmp.setEndPoint('endToEnd', sel) for (var i=0; tmp.text.match(/^[\t]+/g) && i<tmp.text.match(/^[\t]+/g)[0].length; i++) tabs += '\t' sel.text = '\r\n'+tabs sel.select() break default : event.returnValue = true break } } </script> <textarea cols=75 rows=20 onkeydown='editTab()'> <script> alert('ok') </script> </textarea>

*************************************************************

文本框的上/下拉

程序代码：<form name='cnbruce'>
<textarea name='com'>
</textarea>
</form>
<SPAN title='放大输入框' style='FONT-SIZE: 12px; CURSOR: hand' onclick=document.cnbruce.com.rows+=4>向下</SPAN>
<SPAN title='缩小输入框' style='FONT-SIZE: 12px; CURSOR: hand' class='arrow' onclick='if(document.cnbruce.com.rows>=4)document.cnbruce.com.rows-=4;else return false'>向上</SPAN>

*************************************************************

一个复选框，点击之后一组复选框全部都选上

程序代码：

<input type='checkbox' name='checkA' onpropertychange='for(i=0;i<A.children.length;i++){A.children[i].checked=this.checked}'>a <br> <span id='A'> <input type='checkbox' name='A1'> <input type='checkbox' name='A2'> <input type='checkbox' name='A3'> </span>

*************************************************************

Debug Textarea：在线写 js 脚本的时候，用来即时查错的东西！

程序代码：<HTML>
<HEAD>
<TITLE>Debug Textarea</TITLE>
<meta http-equiv='Content-Type' content='text/html; charset=gb2312'>
</HEAD>
<style>

* {}{
font-size: 12px
}
body {}{
margin: 10px; padding: 0px
}
table.list{}{
cursor: default;
border:1px solid #cccccc
background-color: #cccccc;
border-collapse: collapse;
border-Color: #cccccc;
}
</style>
<script language='javascript'>
// Coded by windy_sk <windy_sk@126.com> 20040205

function reportError(msg,url,line) {
var str = 'You have found an error as below: \n\n';
str += 'Err: ' + msg + ' on line: ' + line;
alert(str);
return true;
}

window.onerror = reportError;

document.onkeydown = function() {
if(event.ctrlKey){
switch(event.keyCode) {
case 82: //r
runcode();
break;
case 83: //s
savecode();
break;
case 71: //g
goto(prompt('Please input the line number', '1'));
break;
case 65: //a
document.execCommand('SelectAll');
break;
case 67: //c
document.execCommand('Copy');
break;
case 88: //x
document.execCommand('Cut');
break;
case 86: //v
document.execCommand('Paste');
break;
case 90: //z
document.execCommand('Undo');
break;
case 89: //y
document.execCommand('Redo');
break;
default:
break;
}
event.keyCode = 0;
event.returnValue = false;
}
return;
}

function show_ln(){
var txt_ln = document.getElementById('txt_ln');
var txt_main = document.getElementById('txt_main');
txt_ln.scrollTop = txt_main.scrollTop;
while(txt_ln.scrollTop != txt_main.scrollTop) {
txt_ln.value += (i++) + '\n';
txt_ln.scrollTop = txt_main.scrollTop;
}
return;
}

function editTab(){
var code, sel, tmp, r
var tabs=''
event.returnValue = false
sel =event.srcElement.document.selection.createRange()
r = event.srcElement.createTextRange()

switch (event.keyCode){
case (8) :
if (!(sel.getClientRects().length > 1)){
event.returnValue = true
return
}
code = sel.text
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
// 出错检验代码~~~~~~
if(sel.parentElement() != tmp.parentElement()) return;
sel.setEndPoint('startToStart', tmp)
sel.text = sel.text.replace(/^\t/gm, '')
code = code.replace(/^\t/gm, '').replace(/\r\n/g, '\r')
r.findText(code)
r.select()
break
case (9) :
if (sel.getClientRects().length > 1){
code = sel.text
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
// 出错检验代码~~~~~~
if(sel.parentElement() != tmp.parentElement()) return;
sel.setEndPoint('startToStart', tmp)
sel.text = '\t'+sel.text.replace(/\r\n/g, '\r\t')
code = code.replace(/\r\n/g, '\r\t')
r.findText(code)
r.select()
}else{
sel.text = '\t'
sel.select()
}
break
case (13) :
tmp = sel.duplicate()
tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)
// 出错检验代码~~~~~~
if(sel.parentElement() != tmp.parentElement()) return;
tmp.setEndPoint('endToEnd', sel)
for (var i=0; tmp.text.match(/^[\t]+/g) && i<tmp.text.match(/^[\t]+/g)[0].length; i++) tabs += '\t'
sel.text = '\r\n'+tabs
sel.select()
break
default :
event.returnValue = true
break;
}
return;
}

function runcode() {
var str = document.getElementById('txt_main').value;
var code_win = window.open('about:blank');
code_win.document.open();
code_win.document.writeln('<script>');
code_win.document.writeln('function reportError(msg,url,line){\nline-=14;\nvar str='You have found an error as below: \\n\\n';\nstr+='Err: '+msg+' on line: '+(line);\nalert(str);\nopener.goto(line);\nopener.focus();\nwindow.onerror=null;\nsetTimeout('self.close()',10);\nreturn true;\n}');
code_win.document.writeln('window.onerror = reportError;');
code_win.document.writeln('<\/script>');
code_win.document.writeln(str);
code_win.document.close();
return;
}

function savecode() {
var str = document.getElementById('txt_main').value;
var code_win = window.open('about:blank','_blank','top=10000');
code_win.document.open();
code_win.document.writeln(str);
code_win.document.close();
code_win.document.execCommand('saveas','','code.html');
code_win.close();
return;
}

function goto(ln) {
if(!/^\d+$/.test(ln)) return;
var obj = document.getElementById('txt_main');
var rng = obj.createTextRange();
var arr = obj.value.replace(/\r/, '').split(/\n/);
if(ln>arr.length) ln = arr.length;
var str_tmp = '';
for(var i=0; i<ln-1; i++) {
str_tmp += arr[i];
}
rng.moveStart('character',str_tmp.length+1);
str_tmp = '';
for(i=ln; i<arr.length; i++) {
str_tmp += arr[i];
}
rng.moveEnd('character',-str_tmp.length);
rng.select();
return;
}

window.onload = function() {document.getElementById('txt_main').value = '<script>\nalert(')\n<\/script>';}
</script>
<BODY>
<table width='600' class='list' border='1' bgcolor='#eeeeee' bordercolorlight='#000000' bordercolordark='#FFFFFF' cellpadding='0' cellspacing='0'>

<tr bgcolor='#cccccc'>
<td colspan='2' height='20' align='center'><b>Debug Textarea</b></td>
</tr>
<tr>
<td colspan='2'>
<table width='95%' border='0' align='center' >
<tr>
<td align='center'><br />
<textarea id='txt_ln' name='content' rows='10' style='40px;overflow:hidden;height:200px;border-right:0px;text-align:right;line-height:14px' onselectstart='this.nextSibling.focus();return false' readonly></textarea><textarea id='txt_main' name='content' rows='10' cols='80' onkeydown='editTab()' onkeyup='show_ln()' onscroll='show_ln()' wrap='off' style='overflow:auto;height:200px;padding-left:5px;border-left:0px;line-height:14px'></textarea>
<script>for(var i=1; i<=20; i++) document.getElementById('txt_ln').value += i + '\n';</script>
</td>
</tr>
<tr>
<td align='center'><br />
<input type='button' value=' 运行 ' onclick='runcode()' accesskey='r'>  
<input type='button' value=' 保存 ' onclick='savecode()' accesskey='s'>  
<input type='button' value=' 跳转 ' onclick='goto(prompt('Please input the line number', '1'))' accesskey='g'>  
</td>
</tr>
</table>
</td>
</tr>
</table>
</BODY>
</HTML>

*************************************************************

TAB键在文本域中的体现

程序代码：<script> function editTab() { var code, sel, tmp, r var tabs='' event.returnValue = false sel =event.srcElement.document.selection.createRange() r = event.srcElement.createTextRange() switch (event.keyCode) { case (8) : if (!(sel.getClientRects().length > 1)) { event.returnValue = true return } code = sel.text tmp = sel.duplicate() tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top) sel.setEndPoint('startToStart', tmp) sel.text = sel.text.replace(/^\t/gm, '') code = code.replace(/^\t/gm, '').replace(/\r\n/g, '\r') r.findText(code) r.select() break case (9) : if (sel.getClientRects().length > 1) { code = sel.text tmp = sel.duplicate() tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top) sel.setEndPoint('startToStart', tmp) sel.text = '\t'+sel.text.replace(/\r\n/g, '\r\t') code = code.replace(/\r\n/g, '\r\t') r.findText(code) r.select() } else { sel.text = '\t' sel.select() } break case (13) : tmp = sel.duplicate() tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top) tmp.setEndPoint('endToEnd', sel) for (var i=0; tmp.text.match(/^[\t]+/g) && i<tmp.text.match(/^[\t]+/g)[0].length; i++) tabs += '\t' sel.text = '\r\n'+tabs sel.select() break default : event.returnValue = true break } } </script> <textarea cols=75 rows=20 onkeydown='editTab()'> <script> alert('ok') </script></textarea>

*************************************************************

获取input的非value值，而是显示文本值

程序代码：
<select name='sss' onChange='alert(this.options[this.selectedIndex].text)'>
<option value='1'>asdf</option>
<option value='2'>bbbb</option>
<option value='3'>ccc</option>
</select>

*************************************************************

select里的option进行分类列表

程序代码：
<span style='position:absolute;border:1px inset #d3d6d9'><select style='margin:-2px; 200px'>
<option selected>------------请选择------------</option>
<optgroup label='JavaScript&VBScript区'>
<option>原创
<option>经典
<optgroup label='后台区'>
<option>asp&sql
<option>php&mysql
</select></span>

*************************************************************

动态添加

程序代码：<form name='myForm' method='post'> <select name='dept_company' size='10' multiple id='dept_company' class='mySelect'> <option value=''>Please Select</option> <option value='a'>AA</option> <option value='b'>BB</option> <option value='c'>CC</option> </select><input name='dept_company_list' type='hidden'> <input name='button' type='button' class='myButton' onClick='addItem('dept_company','dept_company2')' value='添加-->>'> <input name='button' type='button' class='myButton' onClick='deleteItem('dept_company2','dept_company')' value='<<--删除'> <select name='dept_company2' size='10' multiple id='dept_company2' class='mySelect'> </select> </form> <script> function addItem(fromName,toName){ eval('var obj1=myForm.'+fromName); eval('var obj2=myForm.'+toName); obj1.options[0].selected=false; if(obj1.selectedIndex == -1) return false; var tempValue; var tempText; for(var i=1;i<obj1.length;i++){ //begin from 1 if(obj1.selectedIndex == -1)break; tempValue=obj1.options[obj1.selectedIndex].value; tempText=obj1.options[obj1.selectedIndex].text; obj1.options[obj1.selectedIndex]=null; obj2.add(new Option(tempText,tempValue),0); } } function deleteItem(fromName,toName){ eval('var obj1=myForm.'+fromName); eval('var obj2=myForm.'+toName); if(obj1.selectedIndex == -1) return false; var tempValue; var tempText; for(var i=0;i<obj1.length;i++){ //begin from 0 if(obj1.selectedIndex == -1)break; tempValue=obj1.options[obj1.selectedIndex].value; tempText=obj1.options[obj1.selectedIndex].text; obj1.options[obj1.selectedIndex]=null; obj2.add(new Option(tempText,tempValue),1); //addItem index is 1 } } </script>

*************************************************************

提示限制输入的字符数

程序代码：
<script language='JavaScript'>
<!--

function SymError()
{
return true;
}

window.onerror = SymError;

function strlength(str){
var l=str.length;
var n=l
for (var i=0;i<l;i++)
{
if (str.charCodeAt(i)<0||str.charCodeAt(i)>255) n++
}
return n
}

function changebyte(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all('byte').innerText='还可以输入'+(length-l)+'字节'
}
else
{
document.all('byte').innerText='输入字节数超出范围'
}
return true
}

function changebyte1(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all('byte1').innerText='还可以输入'+(length-l)+'字节'
}
else
{
document.all('byte1').innerText='输入字节数超出范围'
}
return true
}

function changebyte2(value,length){
var l=strlength(value)
if (l<=length) {
if (document.all!=null) document.all('byte2').innerText='还可以输入'+(length-l)+'字节'
}
else
{
document.all('byte2').innerText='输入字节数超出范围'
}
return true
}
</script>
<form method='post' name=test onSubmit='return checkdata()' action=''>
<TEXTAREA onkeydown='return changebyte1(document.test.icqcontent.value,198)' onkeyup='return changebyte1(document.test.icqcontent.value,198)' name=icqcontent cols=40 rows='3'></TEXTAREA>
<SPAN id=byte1><SCRIPT language=JavaScript>changebyte1(document.test.icqcontent.value,198);</SCRIPT></SPAN>
</form>

*************************************************************

判断填写字数的限制

程序代码：
<script language=javascript>
function gbcount(message,total,used,remain)
{
var max;
max&n, bsp;= total.value;
if(message.value.length > max){
message.value = message.value.substring(0,max);
used.value = max;
remain.value = 0;
alert('留言不能超过规定的字数!');
}
else{
used.value = message.value.length;
remain.value = max - used.value;
}
}
</script>

<form name='myform' >
<textarea name='GuestContent' cols='59' rows='6' onkeydown=gbcount(this.form.GuestContent,this.form.total,this.form.used,this.form.remain); onkeyup=gbcount(this.form.GuestContent,this.form.total,this.form.used,this.form.remain);></textarea>
最多字数：<INPUT disabled maxLength=4 name=total size=3 value=20>
已用字数：<INPUT disabled maxLength=4 name=used size=3 value=0>
剩余字数：<INPUT disabled maxLength=4 name=remain size=3>
</form>
相关阅读:
关于多重条件的搜索查询（sql server＋c#）
sqlserver2005安装错误：性能监视器计数器要求:SQL Server 2005 中为安装程序增加计数器注册表项值....
javascript动态网页编程实例手册－－学习笔记
 asp与asp.net共用session
如何备份和还原虚拟主机上的数据库到本地
 sql server cannot delete last ''...
SQL Server 2000的企业管理器无法打开
 asp.net2.0(c#)关于画图的一个例子;
JBOSS SOA Platform
C#编译开关
原文地址：https://www.cnblogs.com/SUNBOY/p/977137.html