var TimeOfLastClick =0; // init at page load
function onEndCrop( coords, dimensions ) 
	{
	$( 'x1' ).value = coords.x1;
	$( 'y1' ).value = coords.y1;
	$( 'x2' ).value = coords.x2;
	$( 'y2' ).value = coords.y2;
	$( 'width' ).value = dimensions.width;
	$( 'height' ).value = dimensions.height;
	
	// get time of this click in milseconds
	var thisClick=new Date(); 
	var thisClickMs = thisClick.getTime();

	// if this click happened within 300ms of last one it's 
	//  a double click so submit a form named 'cropform'
	if ((thisClickMs - TimeOfLastClick)< 300  )
		self.document.forms['cropform'].submit()
	// not double click so update global var 
	//TimeOfLastClick with this click's timestamp			
	TimeOfLastClick = thisClickMs;
	}