// JavaScript Document
function pokaz(param,w) {
	obj=document.getElementById(param);
	if(!obj) return;
	
	path1=obj.style;
	if (w==null) {
		if (path1.display=='none') path1.display=''; else path1.display='none';
	} else {
			if (w==1) path1.display=''; else path1.display='none';	
	}
}

function isNumberKey(evt) {
 var charCode = (evt.which) ? evt.which : event.keyCode
 if (charCode > 31 && (charCode < 48 || charCode > 57))
	return false;

 return true;

}