显示行号的文本框效果代码,JS代码库,德仔网

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代码分类
【JS】显示行号的文本框效果
作者:zzylscy/ / 发布于2013/10/24/ 601

	<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){
	strVal=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;
	str=str.replace(/\r/gi,"");
	str=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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