为什么下边两个aleart是0? 哪位兄弟清楚?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<script language="javascript">
var getCharSize = document.createElement("span");
var testString = "";
for (var i = 0; i < 10; i++)
testString += "M";
var theMs = testString;
for (var i = 1; i < 10; i++)
{
theMs += "<br>" + testString;
// theMs += "\n" + testString;
}
getCharSize.innerHTML = theMs; alert(getCharSize.offsetHeight);
alert(getCharSize.offsetWidth);
</script>
<body>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<script language="javascript">
var getCharSize = document.createElement("span");
var testString = "";
for (var i = 0; i < 10; i++)
testString += "M";
var theMs = testString;
for (var i = 1; i < 10; i++)
{
theMs += "<br>" + testString;
// theMs += "\n" + testString;
}
getCharSize.innerHTML = theMs; alert(getCharSize.offsetHeight);
alert(getCharSize.offsetWidth);
</script>
<body>
</body>
</html>
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<script language="javascript">
var getCharSize = document.createElement("span");
var testString = "";
for (var i = 0; i < 10; i++)testString += "M";
var theMs = testString;
for (var i = 1; i < 10; i++)theMs += "<br>" + testString;
getCharSize.innerHTML = theMs;
//document.body.appendChild(getCharSize);
alert(getCharSize.offsetHeight);
alert(getCharSize.offsetWidth);
</script>
因为你还没有向页面中添加,如注释部分