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 ＜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>
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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>
