The innerHTML property is valid for both block and inline elements. By definition, elements that do not have both an opening and closing tag cannot have an innerHTML property.
The innerHTML property takes a string that specifies a valid combination of text and elements.
When the innerHTML property is set, the given string completely replaces the existing content of the object. If the string contains HTML tags, the string is parsed and formatted as it is placed into the document.
This property is accessible at run time, as of Microsoft® Internet Explorer 5. Removing elements at run time, before the closing tag is parsed, could prevent other areas of the document from rendering.
When using innerHTML to insert script, you must include the DEFER attribute in the script element.
You can change the value of the title element using the document .title property.
To change the contents of the table , tFoot , tHead , and tr elements, use the table object model described in How to Build Tables Dynamically . For example, use the rowIndex property or the rows collection to retrieve a reference to a specific table row. You can add or delete rows using the insertRow and deleteRow methods. To retrieve a reference to a specific cell, use the cellIndex property or the cells collection. You can add or delete rows using the insertCell and deleteCell methods. To change the content of a particular cell, use the innerHTML property.
To maintain compatibility with earlier versions of Internet Explorer, this property applies to the textArea object. However, the property works only with strings that do not contain tags. With a string that contains a tag, this property returns an error. It is better to use the innerText property with this object.