利用js打造的一个非常实用简易的文本编辑框,可以显示行号并且同时兼容ie和firefox等主流浏览器,如下效果图:
以下是该效果的源码:
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
- <title>显示行号的文本框效果,兼容ie、火狐等浏览器</title>
- <style type="text/css">
- #main{color:#666}
- textarea{border:1px solid #7f9db9;font-size:9pt;width:430px;color:#000}
- .grey{color:#999}
- #msg1,#msg2,#msg3,#msg4{ display:none}
- #ol{position:absolute;z-index:1;padding:0px;margin:0px;border:0px;background:#ecf0f5;width:23px;text-align:left; }
- #li{background:#ecf0f5;height:160px;overflow:hidden;width:32px;border-right:0;line-height:20px;margin:0px;padding:0px;text-align:center}
- #c2{font-family:Arial, Helvetica, sans-serif;height:160px; margin:0px; width:416px;padding:0 0 0 35px;overflow-x: hidden;line-height:20px;}
- </style>
- <script type="text/javascript">
- String.prototype.trim2=function(){
- return this.replace(/(^/s*)|(/s*$)/g, "");
- }
- function F(objid){
- return document.getElementById(objid).value;
- }
- function G(objid){
- return document.getElementById(objid);
- }
- </script>
- </head>
- <body onLoad="keyUp();">
- <div>
- <table width="100%" border="0" cellspacing="0" cellpadding="0" style="position:relative">
- <tr>
- <td width="55%">
- <div id="ol"><textarea cols="2" rows="10" id="li" disabled></textarea></div>
- <textarea name="co" cols="60" rows="10" wrap="off" id="c2" onblur="check('2')" onKeyUp="keyUp()" onFocus="clearValue('2')" onscroll="G('li').scrollTop=this.scrollTop;" oncontextmenu="return false" class="grey">请在这里粘入多段字看一看。
- </textarea>
- </td>
- </tr>
- </table>
- </div>
- <em class="block" id="msg2">文本框没有内容。</em>
- <script type="text/javascript">
- var msgA=["msg1","msg2","msg3","msg4"];
- var c=["c1","c2","c3","c4"];
- var slen=[50,20000,20000,60];//允许最大字数
- var num="";//http://www.phpernote.com/javascript-function/752.html
- var isfirst=[0,0,0,0,0,0];
- function isEmpty(strVal){
- if( strVal=="" )
- return true;
- else
- return false;
- }
- function isBlank(testVal){
- var regVal=/^/s*$/;
- return (regVal.test(testVal))
- }
- function chLen(strVal){
- strValstrVal=strVal.trim2();
- var cArr=strVal.match(/[^/x00-/xff]/ig);
- return strVal.length+(cArr==null ? 0 : cArr.length);
- }
- function check(i){
- var iValue=F("c"+i);
- var iObj=G("msg"+i);
- var n=(chLen(iValue)>slen[i-1]);
- if((isBlank(iValue)==true)||(isEmpty(iValue)==true)||n==true){
- iObj.style.display ="block";
- }else{
- iObj.style.display ="none";
- }
- }
- function checkAll(){
- for(var i=0;i<msgA.length;i++){
- check(i+1);
- if(G(msgA[i]).style.display=="none"){
- continue;
- }else{
- alert("填写错误,请查看提示信息!");
- return;
- }
- }
- G("form1").submit();
- }
- function clearValue(i){
- G(c[i-1]).style.color="#000";
- keyUp();
- if(isfirst[i]==0){
- G(c[i-1]).value="";
- }
- isfirst[i]=1;
- }
- function keyUp(){
- var obj=G("c2");
- var str=obj.value;
- strstr=str.replace(//r/gi,"");
- strstr=str.split("/n");
- n=str.length;
- line(n);
- }
- function line(n){
- var lineobj=G("li");
- for(var i=1;i<=n;i++){
- if(document.all){
- num+=i+"/r/n";
- }else{
- num+=i+"/n";
- }
- }
- lineobj.value=num;
- num="";
- }
- function autoScroll(){
- var nV=0;
- if(!document.all){
- nV=G("c2").scrollTop;
- G("li").scrollTop=nV;
- setTimeout("autoScroll()",20);
- }
- }
- if(!document.all){
- window.addEventListener("load",autoScroll,false);
- }
- </script>
- </body>
- </html>
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