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>
程序代码：
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.keyCodeif (key1==37 || key1==39){ obj.blur();nextip=parseInt(obj.name.substr(2,1))nextip=key1==37?nextip-1:nextip+1;nextip=nextip>=5?1:nextipnextip=nextip<=0?4:nextipeval('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))+1nextip=nextip>=5?1:nextipnextip=nextip<=0?4:nextipeval('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 #ccccccbackground-color: #cccccc;border-collapse: collapse;border-Color: #cccccc;}</style><script language='javascript'>// Coded by windy_sk <windy_sk@126.com> 20040205function 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: //rruncode();break;case 83: //ssavecode();break;case 71: //ggoto(prompt('Please input the line number', '1'));break;case 65: //adocument.execCommand('SelectAll');break;case 67: //cdocument.execCommand('Copy');break;case 88: //xdocument.execCommand('Cut');break;case 86: //vdocument.execCommand('Paste');break;case 90: //zdocument.execCommand('Undo');break;case 89: //ydocument.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, rvar tabs=''event.returnValue = falsesel =event.srcElement.document.selection.createRange()r = event.srcElement.createTextRange()switch (event.keyCode){case (8) :if (!(sel.getClientRects().length > 1)){event.returnValue = truereturn}code = sel.texttmp = 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()breakcase (9) :if (sel.getClientRects().length > 1){code = sel.texttmp = 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()}breakcase (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'+tabssel.select()breakdefault :event.returnValue = truebreak;}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=lfor (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>