function openCenterWin(url, windowname, width, height)
{
    var left = (screen.width - width) /2;
    var top = (screen.height - height) / 2;
    
	var settings  = 'height=' + height + ',';
	settings += 'width='+ width + ',';
	settings += 'top=' + top + ',';
	settings += 'left='+ left + ',';
	settings += 'scrollbars=yes,toolbar=no,resizable=yes';
	
	win = window.open(url, windowname, settings);
	
	if(parseInt(navigator.appVersion) >= 4)
	{
		win.window.focus();  
    }
}

function trapKeyDown(buttonId)
{
	var button = document.getElementById(buttonId);
	
	if (event.keyCode == 13)
	{ 
		event.returnValue=false;
		event.cancel = true;
		button.click();
	} 
}

function fnTrapKD(btn, event){

		if (document.all){

		if (event.keyCode == 13){

		event.returnValue=false;

		event.cancel = true;

		document.getElementById(btn).click();
		}

		}

		else if (document.getElementById){

		if (event.which == 13){

		event.returnValue=false;

		event.cancel = true;
		//
		}

		}

		else if(document.layers){

		if(event.which == 13){

		event.returnValue=false;

		event.cancel = true;

		//

		}

		}

		}