getElementById Method

DHTML文档教程

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Returns a reference to the first object with the specified value of the id attribute.

dhtml语法

oelement = document.getelementbyid(sidvalue)

parameters

sIDValue

Required. Stringthat specifies the value of an ID attribute.

Return Value

Returns the first object with the same ID attribute as the specified value.

Remarks

If the ID value belongs to a collection, the getElementById method returns the first object in the collection.

DHTML代码范例

This example uses the getElementById method to return the first occurrence of the ID attribute value, oDiv.

<SCRIPT>
function fnGetId(){
// Returns the first DIV element in the collection.
var oVDiv=document.getElementById("oDiv1");
}
</SCRIPT>
<DIV ID="oDiv1">Div #1</DIV>
<DIV ID="oDiv2">Div #2</DIV>
<DIV ID="oDiv3">Div #3</DIV>
<INPUT TYPE="button" VALUE="Get Names" onclick="fnGetId()">

是否符合公共标准

This method is defined in World Wide Web Consortium (W3C) Document Object Model (DOM) Level 1 .

Applies To

	document

更多语法参考

About the W3C Document Object Model