1、obj.style只能获得内嵌样式(inline style)就是写在tag里面的,他访问不到那些链接的外部css和在head中用
<script> <br>alert(document.getElementById("tt").currentStyle.color); <br></script>
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<script> <br>document.getElementById("tt").runtimeStyle.color="black"; <br>alert(document.getElementById("tt").currentStyle.color); <br>alert(document.getElementById("tt").runtimeStyle.color); <br>alert(document.getElementById("tt").style.color); <br></script>
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