function make_diag_draggable(){
	$("#diag_viewport img").draggable();
}

function zoomdiag(zoominout,zoomincrement)
{	if(zoominout == "zoomin")
	{	zoomlevel = zoomlevel + zoomincrement;
	}
	else
	{	zoomlevel = zoomlevel - zoomincrement;
	}
	if(zoomlevel < 110 && zoomlevel > 10)
	{	var zoomedimgurl = diagurl + "ilSC=" + zoomlevel;
		document.getElementById('diag_viewport').innerHTML = "<img src=\""
			+ zoomedimgurl + "\">";

		make_diag_draggable();
	}
}