var NS4     = (document.layers) ? true : false;
var NS6     = (!document.layers)&&(navigator.userAgent.indexOf('Netscape')!=-1) ? true : false;
var IE4plus = (document.all) ? true:false;
var Mozilla = (document.layers) ? true:false;
 
function OpenWin(){
	
	var topPosition;
	var leftPosition;
	var PageHeight;

	var addr   = arguments[0];	
	var w  	   = arguments[1]; 
	var h 	   = arguments[2];

	var name = 'newwin';
	
	if (NS4 || NS6){
		PageHeight = window.innerHeight;
		if (PageHeight < 500){
				topPosition = 161;
				leftPosition = 35;
		} else if (PageHeight < 620){
				topPosition = 161;
				leftPosition = 35;
		} else {
				topPosition = 161;
				leftPosition = 35;
		}
		newwin = window.open(addr, name, 'height='+h+',width='+w+',screenY='+topPosition+',screenX='+leftPosition+',scrollbars=yes,resizable=yes');
	} else {
		PageHeight = screen.availHeight;
		if (PageHeight < 600){
				topPosition = 161;
				leftPosition = 35;
		} else if (PageHeight < 800){
				topPosition = 161;
				leftPosition = 35;
		} else {
				topPosition = 161;
				leftPosition = 35;
		}
		newwin = window.open(addr, name, 'height='+h+',width='+w+',top='+topPosition+',left='+leftPosition+',scrollbars=yes,resizable=yes');
	}
}

function showHide(obj,action){
	
	var obj    = arguments[0];
	var action = arguments[1];
	
	obj = document.getElementById(obj);

	if(arguments.length == 1){
		if(document.layers)
			var display = obj.style.visibility ? 'show' : 'hide';
		else
			var display = obj.style.display ? '' : 'none';
		obj.style.display = display;	
	}else{
		if(document.layers){		
			if(action == 'show')
				obj.style.visibility='show';
			else		
				obj.style.visibility='hide';
		}else{			
			if(action == 'show')
				obj.style.display='';
			else		
				obj.style.display='none';
		}		
	}
}

function tab(orig,dest){
	if (orig.getAttribute&&orig.value.length==orig.getAttribute("maxlength"))
	dest.focus();
}