function kat(obj) {
	
	pre = obj.name.split('[')[0].length+1;
	
	nazov = obj.name.substring(pre,obj.name.length-1);
	
	pole = nazov.split('_');
	
	var i = 1;
		
	while(document.getElementById(pole[0]+'_'+i)) {
		
		if (document.getElementById(pole[0]+'_'+i).value==obj.value &&
			!document.getElementById(pole[0]+'_'+i).disabled &&
			document.getElementById(pole[0]+'_'+i)!=obj	) {
			
			obj.value='';
		}
		
		i++;
	}

	if(obj.value != '') {
		
		var i = 1;
		
		while((document.getElementById(pole[0]+'_'+(pole[1]*1+i))) && (document.getElementById(pole[0]+'_'+(pole[1]*1+i-1)).value)!='') {
			
			document.getElementById(pole[0]+'_'+(pole[1]*1+i)).disabled=false;
			
			i++;
		}
		
	}
	else {
		
		var i = 1;
		
		while(document.getElementById(pole[0]+'_'+(pole[1]*1+i))) {
				
			document.getElementById(pole[0]+'_'+(pole[1]*1+i)).disabled=true;		
			
			i++;
		}
	}
}

function zmaz(cislo) {
	
	obj = document.getElementById('obr_'+cislo);
	
	obj.value='';
}

function form_check() {
	
	if (document.getElementById('pass').value != document.getElementById('pass2').value) {
		
		alert("Nezhoduje sa overenie hesla!");
		
		return(false);
	}
	
	
}