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,''))"> 只能是数字,判断按键 代码如下: <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 <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> 再加个找按键的值 <script> function show(){ alert("ASCII代码是："+event.keyCode); } </script> <body onkeydown="show()"> 只能是IP地址 <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： <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.baidu.com/"' 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 <textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight"> 上传预览图片 <img id=pic src=http://www.webjx.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 <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> TAB的显示 <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 <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 <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！ <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> 获取input的非value值，而是显示文本值 <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 <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 <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 <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 <script language=javascript> function gbcount(message,total,used,remain) { var max; max = 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>