function init_events() {
document.getElementById('calc').onkeyup =function(){
	var credits = Number(document.getElementById('calc').value); 	

	var cost_euro = 0;
	var mesg;
	var cost_ron = 0;
	var cost_ron_tva=0;
	var message;
	//var euro_ron_rate = 3.6;

	if  ( !credits) { 
		document.getElementById('cost_euro').innerHTML  = 
		 "Please fill in the field with a number greater than or equal with 100";
		return true; 
	}
	
	if ( credits < 100  ) {
		message = 'You must buy at least 100 credits';

	} 
	else if (credits >= 100 && credits <= 999 ) {
		cost_euro = credits * 0.045 ;
	}
	else if ( credits >= 1000 && credits <= 9999 ) {
		cost_euro = credits * 0.043;	
	} 
	else if ( credits >=10000 && credits <= 49999 ) {
		cost_euro = credits * 0.040;	
	} 
	else if (credits >= 50000 && credits <= 99999) {
		cost_euro = credits * 0.038;
	}
	else if ( credits >= 100000 ) {
		message = '<a href="/contact">Please contact us</a>';
	}

	cost_ron = cost_euro * euro_ron_rate;
	cost_ron_tva = cost_ron * 1.19;

	document.getElementById('cost_euro').innerHTML =
		( ( cost_euro  ) ? "<em>Price EURO: </em> " + cost_euro.toFixed(2) + '&euro;': message ) ;

	document.getElementById('cost_ron_tva').innerHTML =
		( ( cost_euro ) ? "<em>Price RON+VAT: </em> " + cost_ron_tva.toFixed(2) + ' RON' : '' ) ;	

}
}