<script language="javascript">
function bianya()
{
alert(document.getElementById('a').innerHTML.toString()=="a")
alert(document.getElementById('a').innerHTML.toString()=="a")
if(document.getElementById('a').innerHTML=="a"){//这里去掉分号 ,加上大括号
document.getElementById('a').innerHTML="b";
}
}
</script>
<span id="a" onclick="bianya()" style="cursor:hand;" >a</span>//注意这里 ,你的a后面有个空格
function bianya()
{
alert(document.getElementById('a').innerHTML.toString()=="a")
alert(document.getElementById('a').innerHTML.toString()=="a")
if(document.getElementById('a').innerHTML=="a"){//这里去掉分号 ,加上大括号
document.getElementById('a').innerHTML="b";
}
}
</script>
<span id="a" onclick="bianya()" style="cursor:hand;" >a</span>//注意这里 ,你的a后面有个空格
if(document.getElementById('a').innerHTML=="a")
<span id="a" onClick="bianya()" style="cursor:hand;" >a </span>
多了一个空格
<span id="a" onClick="bianya()" style="cursor:hand;" >a</span>
到网上下一个JAVASCRIPT方面的书看看。
DHTML.chm 网上有
http://bbs.51js.com/thread-74643-1-1.html
其实我想说的是下面段代码
别的都可以不看 就看红色的
不要红色的是对的 要红色的就报错<style type="text/css">
body{
font:12px;
}
.a{
position:absolute;
top:30px;
left:0px;
width:200px;
height:150px;
background-color:#ffffff;
border-left:1px solid #A8C29F;
border-bottom:1px solid #A8C29F;
border-right:1px solid #A8C29F;
}
</style>
<script language="JavaScript" type="text/javascript"> function xianyin(){
if(document.getElementById('oDiv').style.display=="")
document.getElementById('oDiv').style.display="none";
document.getElementById('s').innerHTML="□";else
document.getElementById('oDiv').style.display="";
document.getElementById('s').innerHTML="-";}
var dragapproved=false; function drag()
{
if(!document.all)
{
return;
}
if(event.srcElement.className=="myClass")
{
dragapproved=true;
var obj=event.srcElement;
var tempX=obj.style.pixelLeft;
var tempY=obj.style.pixelTop;
var x=event.clientX;
var y=event.clientY;
document.onmousemove=move;
function move()
{ if(event.button==1 && dragapproved)
{
obj.style.pixelLeft=tempX+event.clientX-x;
obj.style.pixelTop=tempY+event.clientY-y;
return false;
}
}
}
}
document.onmousedown=drag;
document.onmouseup=new Function("dragapproved=false");
</script>
<div class="myClass" style="cursor:hand; position:absolute;top:200px;left:200px;width:200px; height:30px; background-color:#A8C29F;" onmouseover="this.style.cursor='hand';this.style.backgroundColor='#cccccc';" ondblclick="xianyin()" onmouseout="this.style.backgroundColor='#A8C29F';" >最新消息<span id="s" onclick="xianyin()">-</span> X
<div id="oDiv" class="a" > <span class="b" >新浪 </span> </div>
}else{
}
注意一般的写法