function opencalendar(Item) 
{
    var calendarWindow;	
	var mLX = (document.all)? 218 : 220; // height="HEIGHT: 759px; WIDTH: 243px"
	var mLY = (document.layers)? 350 : 350; // width
	
	var mY = (screen.height-mLY)/2 ;
	var mX = (screen.width-mLX)/2 ;
	mY = mY*0.8;
	window.dateObject = Item;
	window.LanguageID=0;  
	calendarWindow = open( "../../includes/buttoncalendar.htm", "fcnwindow", "width=" + mLX + ",height=" + mLY + ",screenX=" + mX + ",screenY=" + mY  + ',left=' + mX + ',top=' + mY + ",toolbar=no,scrollbars=no,resizable=no");
    calendarWindow.focus();
}          
function checkCalendarDate(oB)
{
 var dArr = oB.value.split("/");
 if(dArr.length != 3)
 {
  oB.value="";
  return;
 }
 var mm = parseInt(dArr[0]);
 var dd = parseInt(dArr[1]);
 var yy = parseInt(dArr[2]);
 if( mm >= 1 && mm < 12 && dd >=1 && dd < 31 && isNaN(yy) == false)
   return;
 
 oB.value="";  
}