document.all[parentEntityID]确定一个控件对象
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object.insertAdjacentHTML(sWhere, sText)
Inserts the given HTML text into the element at the location.
sWhere:beforeBegin-->Inserts sText immediately before the object.
afterBegin-->Inserts sText after the start of the object but before all other content in the object.
beforeEnd-->Inserts sText immediately before the end of the object but after all other content in the object.
afterEnd-->Inserts sText immediately after the end of the object.
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