Analysis of the differences between style, currentStyle and runtimeStyle_javascript skills

1. obj.style can only obtain the inline style (inline Style) that is written in the Tag. It cannot access the external css of those links and the style declared with

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<script> <br>alert(document.getElementById("tt"). currentStyle.color); <br></script>

If the style in the above

is removed, it will be

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, then currentStyle.color becomes yellow according to the priority, but style.color is empty at this time.
3. RuntimeStyle simply means that you can assign a value to the style of a node, and it will become the node style with the highest priority. " -//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

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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>



The color of the words displayed on the page at this time is black after the runtimeStyle is assigned. But only currentStyle.color and runtimeStyle themselves can get this value, and style.color still gets the blue in the tag.