The role of the entry function, waiting for the page to be loaded, has an independent scope,
jQuery entry function The writing method is as follows
<script>
// 方式一
$(document).ready(function () {
alert("hello lnj");
}); // 方式二,最常使用的一种
$(function () {
alert("hello lnj");
}); // 方式三
jQuery(document).ready(function () {
alert("hello lnj");
}); // 方式四
jQuery(function () {
alert("hello lnj");
});
</script>Example:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="jquery-1.7.1.js" type="text/javascript"></script>
</head>
<body style=" overflow-y:scroll;overflow-x:auto;">
<input type="text" id="dd1" value="" />
<textarea id="tt" cols="30" rows="30"></textarea>
</body>
<script>
var i=1;
//jQuery方式
$(function(){
var str=$("#tt").val()+'\r\n'+'$_B加载完毕'+i;
$("#tt").val(str);
i++;
}) ;
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