超级实用的几种表单校验效果

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'>

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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();'>

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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()'>

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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>

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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>

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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'>

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上传预览图片

 

程序代码：＜img id=pic src=http://webdesign.chinaitlab.com/UploadFiles_8014/200704/20070426094402829.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'>

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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>

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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>

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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>

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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>

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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>

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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 ＜[email protected]> 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>

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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>

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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>

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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>

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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>

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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>

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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>