怎么实现节点图标没展开时图标是+号 ，展开后图标变为-号
日期：2014-05-17 浏览次数：20500 次
如何实现节点图标没展开时图标是+号 ，展开后图标变为-号
如何实现节点图标没展开时图标是+号 展开后图标变为-号 是要用js控制吗 如何实现 谢谢各位
页面如下
<html>
<head>
<meta http-equiv="Content-Language" content="zh-cn">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>数据展现</title>
<style type="text/css">
.spanstyle {
COLOR: #00cccc; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; POSITION: absolute; TOP: -50px; VISIBILITY: visible
}
</style>
<script language="JavaScript1.2">
scores = new Array(20);var numTotal=0;NS4 = (document.layers) ? 1 : 0;IE4 = (document.all) ? 1 : 0;ver4 = (NS4 || IE4) ? 1 : 0;if (ver4) { with (document) { write
("<STYLE TYPE='text/css'>"); if (NS4) { write(".parent {position:absolute; visibility:visible}"); write(".child {position:absolute;
visibility:visible}"); write(".regular {position:absolute; visibility:visible}") } else { write(".child {display:none}") }
write("</STYLE>"); }}function getIndex(el) { ind = null; for (i=0; i<document.layers.length; i++) { whichEl = document.layers[i]; if (whichEl.id == el) {
ind = i; break; } } return ind;}function arrange() { nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
for (i=firstInd+1; i<document.layers.length; i++) { whichEl = document.layers[i]; if (whichEl.visibility != "hide") { whichEl.pageY = nextY;
nextY += whichEl.document.height; } }}function initIt(){ if (!ver4) return; if (NS4) { for (i=0; i<document.layers.length; i++) { whichEl =
document.layers[i]; if (whichEl.id.indexOf("Child") != -1) whichEl.visibility = "hide"; } arrange(); } else { divColl = document.all.tags
("DIV"); for (i=0; i<divColl.length; i++) { whichEl = divColl(i); if (whichEl.className == "child") whichEl.style.display = "none"; } }}
function expandIt(el) { if (!ver4) return; if (IE4) { whichEl1 = eval(el + "Child"); for(i=1;i<=numTotal;i++){ whichEl = eval(scores[i]
+ "Child"); if(whichEl!=whichEl1) { whichEl.style.display = "none"; } } whichEl1 = eval(el +
"Child"); if (whichEl1.style.display == "none") { whichEl1.style.display = "block"; } else { whichEl1.style.display = "none"; }
} else { whichEl = eval("document." + el + "Child"); for(i=1;i<=numTotal;i++){ whichEl = eval("document." + scores[i] +
"Child"); if(whichEl!=whichEl1) { whichEl.visibility = "hide"; } } if (whichEl.visibility
== "hide") { whichEl.visibility = "show"; } else { whichEl.visibility = "hide"; } arrange(); }}onload = initIt;
</script>
<style>
<!--
.line3 {
BORDER-RIGHT: #b1e397 1px solid; BORDER-TOP: #b1e397 1px solid; BORDER-LEFT: #b1e397 1px solid; BORDER-BOTTOM: #b1e397 1px solid
}
-->
</style>
</head>
<body >
<div id='KB1Parent' class='parent'>
<b><font size="6" color="
如何实现节点图标没展开时图标是+号 展开后图标变为-号 是要用js控制吗 如何实现 谢谢各位
页面如下
<html>
<head>
<meta http-equiv="Content-Language" content="zh-cn">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>数据展现</title>
<style type="text/css">
.spanstyle {
COLOR: #00cccc; FONT-FAMILY: 宋体; FONT-SIZE: 10pt; POSITION: absolute; TOP: -50px; VISIBILITY: visible
}
</style>
<script language="JavaScript1.2">
scores = new Array(20);var numTotal=0;NS4 = (document.layers) ? 1 : 0;IE4 = (document.all) ? 1 : 0;ver4 = (NS4 || IE4) ? 1 : 0;if (ver4) { with (document) { write
("<STYLE TYPE='text/css'>"); if (NS4) { write(".parent {position:absolute; visibility:visible}"); write(".child {position:absolute;
visibility:visible}"); write(".regular {position:absolute; visibility:visible}") } else { write(".child {display:none}") }
write("</STYLE>"); }}function getIndex(el) { ind = null; for (i=0; i<document.layers.length; i++) { whichEl = document.layers[i]; if (whichEl.id == el) {
ind = i; break; } } return ind;}function arrange() { nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
for (i=firstInd+1; i<document.layers.length; i++) { whichEl = document.layers[i]; if (whichEl.visibility != "hide") { whichEl.pageY = nextY;
nextY += whichEl.document.height; } }}function initIt(){ if (!ver4) return; if (NS4) { for (i=0; i<document.layers.length; i++) { whichEl =
document.layers[i]; if (whichEl.id.indexOf("Child") != -1) whichEl.visibility = "hide"; } arrange(); } else { divColl = document.all.tags
("DIV"); for (i=0; i<divColl.length; i++) { whichEl = divColl(i); if (whichEl.className == "child") whichEl.style.display = "none"; } }}
function expandIt(el) { if (!ver4) return; if (IE4) { whichEl1 = eval(el + "Child"); for(i=1;i<=numTotal;i++){ whichEl = eval(scores[i]
+ "Child"); if(whichEl!=whichEl1) { whichEl.style.display = "none"; } } whichEl1 = eval(el +
"Child"); if (whichEl1.style.display == "none") { whichEl1.style.display = "block"; } else { whichEl1.style.display = "none"; }
} else { whichEl = eval("document." + el + "Child"); for(i=1;i<=numTotal;i++){ whichEl = eval("document." + scores[i] +
"Child"); if(whichEl!=whichEl1) { whichEl.visibility = "hide"; } } if (whichEl.visibility
== "hide") { whichEl.visibility = "show"; } else { whichEl.visibility = "hide"; } arrange(); }}onload = initIt;
</script>
<style>
<!--
.line3 {
BORDER-RIGHT: #b1e397 1px solid; BORDER-TOP: #b1e397 1px solid; BORDER-LEFT: #b1e397 1px solid; BORDER-BOTTOM: #b1e397 1px solid
}
-->
</style>
</head>
<body >
<div id='KB1Parent' class='parent'>
<b><font size="6" color="
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