var popUp; 

    function OpenCalendar(idname, postBack)
    {
	    popUp = window.open('Calendar.aspx?formname=' + document.forms[0].name + 
		    '&id=' + idname + '&selected=' + document.forms[0].elements[idname].value + '&postBack=' + postBack, 
		    'popupcal', 
		    'width=225,height=228,left=200,top=250');
    }


    function SetDate(formName, id, newDate, postBack)
    {
	    eval('var theform = document.' + formName + ';');
	    popUp.close();
	    theform.elements[id].value = newDate;
	    if (postBack)
		    __doPostBack(id,'');
    }