ActiveXObject("Microsoft.XMLDOC"); .xml throws "out to memory".

Hi,

I was using Javascript to read/parse the xml file selected by user and then send the content of that xml file to web service.

var xmlDoc = new ActiveXObject("Microsoft.XMLDOC");
xmlDoc.load("file_path");
another_method(xmlDoc.xml);

when I select the small file (tried upto 83 mb) working file, but when I select the 180 MB file third statement throws "Out of Memory" exception.

xmlDoc.xml  -- this statement throws error

Need u valuable input and suggestion. 

Please help me out..