Javascript trigger objects .click() event

Hi i got a file input object, but i want it to be hidden, and then i user a picture as button to trigget that hidden file input object, the thing is it works fine on IE, but on Firefox wont do anything, not even errors, anyone knows how to trigger the click() event on Firefox?Here is my code:function open_filebrowser(){ document.getElementById("fileBrowse").click();}<input type=file id='fileBrowse' style='display:none;'><img id="bf" src="graphics/open.gif" style='cursor:pointer;' onclick='open_filebrowser();'>