<script type="text/javascript" >
function mousedown(event)
{
var e=window.event;
var obj=e.srcElement;
obj.style.color="red";
obj.style.font-size:20px; //这里
}
function mouseup(event)
{
var e=window.event;
var obj=e.srcElement;
obj.style.color="black";
window.open("https://www.baidu.com/","百度","");
}
</script>
</head>
<body >
<p id="p1" style="color:black" onmousedown="mousedown()" onmouseup="mouseup()"><u>百度</u></p>
</body>字体大小不是这个吗？哪里错了？
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