1.對(duì)屬性的操作
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script type="text/javascript">
//整個(gè)文檔加載完之后會(huì)才會(huì)這個(gè)匿名函數(shù)
window.onload = function(){
document.getElementById("div1").title="我看到了";
var link = document.getElementById("link1");//用前面的命令可以獲取下面的id咖耘，
link.;//對(duì)下面的標(biāo)簽進(jìn)行操作
link.title = "去百度網(wǎng) ";
}
</script>
</head>
<body>
<div id="div1" class="div1" title="">這是div元素</div>
<a href="#" id="link1" >啊實(shí)打?qū)嵉?lt;/a>
</body>
</html>
2.字符間的轉(zhuǎn)換
shuju.png
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>轉(zhuǎn)換為number</title>
<script type="text/javascript">
var a = "123";
a = "abc";
a = Number(a);//這里用number可以把山方面的數(shù)字型字符串轉(zhuǎn)換為數(shù)字秕脓，但是不可以轉(zhuǎn)字符串
console.log(a);
console.log(typeof a);//用typeof運(yùn)算符可以查看當(dāng)前的變量屬性
var b = 123.2223;
b = parseInt(b); //取出字符串中的數(shù)字并且轉(zhuǎn)換為數(shù)字類(lèi)型/還可以小數(shù)取整
console.log(b);
console.log(typeof b);
</script>
</head>
<body>
</body>
</html>
