window.addEvent('domready', function() {		
	chekearEnvio();
	/* habilita o desabilita el submit */	
	function chekearEnvio(){	
		ellength = $$('input[type=checkbox]').length;
		els=$$('input[type=checkbox]');
		a=0;
		
		for(i=0;i<ellength;i=i+1){
			if(els[i].checked==true){a=a-1;}else{a=a+1;}
			if(a==ellength){
				$('btn-emp-submt').disabled=true;
				$('btn-emp-submt').setStyle('opacity',0.5);
			}else{
				$('btn-emp-submt').disabled=false;
				$('btn-emp-submt').setStyle('opacity',1);
			}
		}
	}
	
	$$('input[type=checkbox]').each(function(el,ind){
			el.addEvents({
				'click': function(){
					chekearEnvio();
					$$('input[id^=dropemp]').each(function(rel,ind2){
						indtext = parseInt(rel.name.match(/[\d]+/));
						indcheck = parseInt(el.name.match(/[\d]+/));
						//relhasclass = rel.hasClass('LV_invalid_field');	
						if(indtext == indcheck + 1){
							if(el.checked==true){
								rel.disabled=false;
							}else{
								rel.disabled=true;
							}
						}
					});
				}
			});
	});
});