Returns a reference to the first object with the specified value of the ID attribute.SyntaxoElement = document.getElementById(sIDValue) ParameterssIDValue Required. String that specifies the value of an ID attribute. Return ValueReturns the first object with the same ID attribute as the specified value.ResIf the ID value belongs to a collection, the getElementById method returns the first object in the collection.ExampleThis 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. <!-- @ED mapovey 4/11/2000 :Is this comment in the correct format? --> var oVDiv=document.getElementById("oDiv"); } </SCRIPT> <DIV ID="oDiv">Div #1</DIV> <DIV ID="oDiv">Div #2</DIV> <DIV ID="oDiv">Div #3</DIV> <INPUT TYPE="button" VALUE="Get Names" onclick="fnGetId()">
这句话的意思是返回了一个对象吗?
ParameterssIDValue Required. String that specifies the value of an ID attribute. Return ValueReturns the first object with the same ID attribute as the specified value.ResIf the ID value belongs to a collection, the getElementById method returns the first object in the collection.ExampleThis 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.
<!-- @ED mapovey 4/11/2000 :Is this comment in the correct format? -->
var oVDiv=document.getElementById("oDiv");
}
</SCRIPT>
<DIV ID="oDiv">Div #1</DIV>
<DIV ID="oDiv">Div #2</DIV>
<DIV ID="oDiv">Div #3</DIV>
<INPUT TYPE="button" VALUE="Get Names" onclick="fnGetId()">