Modification method: 1. Use the "document.getElementById("id value")" statement to select the h4 tag node based on the id attribute value; 2. Use "h4 tag node.innerHTML = "Modified content"; " statement can modify the content of the h4 tag.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

The

tag defines the fourth-level heading in an HTML document.

So how does javascript modify the content of the h4 tag?

Implementation idea:

• First select the h4 node
  

• Then use the innerHTML attribute to modify the node content
  

Implementation code:

	
		
	


	
		
一级标题
		
二级标题
		
三级标题
		
四级标题
		
五级标题
		
六级标题
		 修改h4标签的内容

			

	

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