function validacaracteres(evt){	
	var nav4 = window.Event ? true : false;
	// NOTE: Backspace = 8, Enter = 13, '0' = 48, '9' = 57	
	var key = nav4 ? evt.which : evt.keyCode;
	if (key == 13){
		return false;
	}
	return (key == 8 || key==32 || key==43 || (key >= 97 && key <= 122)|| (key>=65 && key <=90) || (key>=48 && key <=57)|| key==45  || key==46 || key == 44 || key==201 || key==205 || key==211 || key==208 || key == 225 || key == 237 || key ==243 || key == 250 || key == 233 || key==95 || key == 64 || key ==241 || key ==209 || key ==13 || key ==40 || key ==41 || key ==47 || key ==58);
}