function handleEnter(e,id)
{
	var key;

	if(window.event)
		key = window.event.keyCode;     //IE
	else
		key = e.which;     //firefox

	if(key == 13)
	{
		document.getElementById(id).click();
		return false;
	}
	else
		return true;
}

//opens a popup window in the center of the page.

function open_window(url, w, h)

{ 

      var winsize = ',width='+w+',height='+h; 

      var winpos  = (window.screen && document.layers) ? ',screenX='+((screen.availWidth-w)/2)+',screenY='+((screen.availHeight-h)/2):(window.screen && !document.layers)?',left='+((screen.availWidth-w)/2)+',top='+((screen.availHeight-h)/2) : ''; 

      imagewin = window.open(url,'imageWin','toolbar=no,scrollbars=yes,location=no'+winsize+winpos); 

      imagewin.focus();

}