IE5 = document.all? 1:0 

	if(!IE5) { 
		document.captureEvents(Event.KEYPRESS) 
	} 
	document.onkeypress = testKey;
	
	function testKey(e) {
		whKey = !IE5? e.which:event.keyCode;
		if (whKey == "13") {
			Calc();
		}
	}