1<script language="javascript">
2function test(obj)
3{
4var range = obj.createTextRange();
5alert("内容区宽度: " + range.boundingWidth
6\+ "px\r\n内容区高度: " + range.boundingHeight + "px");
7
8}
9</script>
1<body>
2<input id="txt"/><input onclick="test(txt)" type="button" value="计算内容宽度"/>
3</body>