<html>
<script>
function text(){
if (window.innerWidth) {
alert(1);
theWidth = window.innerWidth;
theHeight = window.innerHeight;
} else if (document.compatMode == 'CSS1Compat') {
alert(2);
theWidth = document.documentElement.clientWidth;
theHeight = document.documentElement.clientHeight;
} else if (document.body) {
alert(3);
theWidth = document.body.clientWidth;
theHeight = document.body.clientHeight;
}
alert(theWidth);
alert(theHeight);
}
</script>
<body>
<input type="button" value="开始" onclick="text()">
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</body>
</html>
