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;function checkboxUtil(){
	var input
          , init; 
          
	this.init = function(seletor){
		input = $("form input:checkbox");
		var self = this;
		
		input.live('click', function () {
			var elemento = $(seletor);
			self.desmarcar();
			self.marcar(elemento);
		});
	};
	
	this.desmarcar = function(){
		input.each(function () {
			this.checked = false;
		});
	};
	
	this.marcar = function(elem){
		elem.attr('checked', true);		
		}
	};
};

var chkUtil = new checkboxUtil();
$(document).ready(function(){
	chkUtil.init();
});