function DoOnEnter(evt, command, validationGroup) 
{
	var isNav, isIE
	
	if (parseInt(navigator.appVersion) >= 4) 
	{
		if (navigator.appName == "Netscape")
			isNav = true
		else
			isIE = true
	}
	
	var keyValue

	if (isNav) 
		keyValue = evt.which
	else
		keyValue = window.event.keyCode
			  
	if (keyValue == 13)
	{
		if(typeof(Page_ClientValidate) == 'function' && validationGroup)
		{
			if(Page_ClientValidate(validationGroup))
			{
				eval(command);
			}
		}
		else if(typeof(Page_ClientValidate) == 'function')
		{
			if(Page_ClientValidate())
			{
				eval(command);
			}
		}
		else
		{ 
			eval(command);
		}
		
		event.returnValue = false;
		event.cancel = true;
	}



	return false;
}