AjaxXMLHttp object acquisition

XMLHttp object is used in Ajax. I have seen various methods of getting this object, and I think this method is the most elegant. First, consider the appropriate browser; second, consider the priority Loading Order, from the high version to the lower version test, and finally if not found, throw an exception. FunctionFactory... SyntaxHighlighter. all ();

 

XMLHttp object is used in Ajax. I have seen various methods of getting this object, and I think this method is the most elegant. First, consider the appropriate browser; second, consider the priority Loading Order, from the high version to the lower version test, and finally if not found, throw an exception.

 

Function FactoryXMLHttpRequest (){

If (window. XMLHttpRequest ){

Return new XMLHttpRequest ();

} Else if (window. ActiveXObject ){

Var msxmls = new Array (

'Msxml2. XMLHTTP.5.0 ',

'Msxml2. XMLHTTP.4.0 ',

'Msxml2. XMLHTTP.3.0 ',

'Msxml2. xmlhttp ',

'Microsoft. xmlhttp ');

For (var I = 0; I <msxmls. length; I ++ ){

Try {

Return new ActiveXObject (msxmls [I]);

} Catch (e ){

}

}

}

Throw new Error ("cocould not instantiate XMLHttpRequest ");

}

 

From the column hongweigg