只能是写限定的东西
程序代码：
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-width:1;border-color:balck;border-style:solid;width: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; width: 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=''width: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; width: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>
