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JavaScript IE 浏览器 HTML ASP

只能是一些限定的东西

运行代码框
ENTER键可以让光标移到下一个输入框 <input onkeydown="if(event.keyCode==13)event.keyCode=9" > <br>只能是中文<input onkeyup="value=value.replace(/[ -~]/g,'')" onkeydown="if(event.keyCode==13)event.keyCode=9"> <br>屏蔽输入法<input style="ime-mode:disabled" onkeydown="if(event.keyCode==13)event.keyCode=9"> <br>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"> <br>只能是数字<input onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"><br>只能显示，不能修改<input readonly value="只能显示，不能修改">
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只能是数字，判断按键的值。

运行代码框
<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

运行代码框
<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>
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限制网页用键盘

运行代码框
<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;}
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再加个找按键的值

运行代码框
<script>function show(){ alert("ASCII代码是："+event.keyCode);}</script><body onkeydown="show()">
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只能是IP地址

运行代码框
<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-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：

运行代码框
<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.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

运行代码框
<textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight">
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上传预览图片

运行代码框
<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">
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去掉下拉选项的边框

运行代码框
<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

运行代码框
<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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通过下拉菜单传递跳转

运行代码框
<form action="showlog.asp?" ><select name="cat_id" onpropertychange="form.submit();"><option value="">==请选择==</option><option value="11">11</option><option value="22">22</option></select></form>
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TAB键在文本域中的体现

运行代码框
<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

运行代码框
<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

运行代码框
<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！

运行代码框
<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> 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: //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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