function popupWindow(popupLocation, windowName, popupWidth, popupHeight) {
		var leftdist 	= (screen.width - popupWidth) / 2;    	// distance to left edge of window
		var topdist 	= (screen.height - popupHeight) / 2;   	// distance to top edge of window
		var popUpWin = window.open(popupLocation, windowName, "left=" + leftdist + ",top=" + topdist + ",width=" + popupWidth + ",height=" + popupHeight + ",scrollbars=yes,resizable=yes");
		
	}
	
function getItem(id) {
	return document.getElementById&&document.getElementById(id)? document.getElementById(id) : document.all&&document.all[id]? document.all[id] : null;
}	
	
function roll_over(img_name, img_src)
   {
   getItem(img_name).src = img_src;
   }
   
function changeStatus(statusField) {
	if (statusField.value == 'Back Ordered') { 
		getItem('backOrdered').style.display='';
		getItem('Shipped1').style.display='none';
		getItem('Shipped2').style.display='none';
		getItem('Shipped1Field').value='';
	} else if (statusField.value == 'Shipped') {
		getItem('backOrderedField').value = ''; 
		getItem('backOrdered').style.display = 'none';
		getItem('Shipped1').style.display='';
		getItem('Shipped2').style.display='';
	} else {
		getItem('backOrderedField').value = ''; 
		getItem('backOrdered').style.display = 'none';
		getItem('Shipped1').style.display='none';
		getItem('Shipped2').style.display='none';
		getItem('Shipped1Field').value = '';
	}
}