function payboxes(){
	if( document.getElementById( 'payment_boxes' ) ) document.getElementById( 'payment_boxes' ).style.display = "block";
	if( document.getElementById( 'how_it_works' ) ) document.getElementById( 'how_it_works' ).style.display = "none";
}

function changeclass( iddiv, total ){
	
	for(i = 1; i <= total; i++){

		if(document.getElementById( 'tabcontent_' + i )) document.getElementById( 'tabcontent_' + i ).style.display = "none";
		document.getElementById('tablink' + i ).setAttribute("class", "tab");
		document.getElementById('tablink' + i ).className = 'tab';

	}

	if( document.getElementById( 'tabcontent_' + iddiv ) ) document.getElementById( 'tabcontent_' + iddiv ).style.display = 'block';

	document.getElementById('tablink' + iddiv ).setAttribute("class", "active_tab");
	document.getElementById('tablink' + iddiv ).className = 'active_tab';
}


function how_it_works(){
	if( document.getElementById( 'payment_boxes' ) ) document.getElementById( 'payment_boxes' ).style.display = "none";
	if( document.getElementById( 'how_it_works' ) ) document.getElementById( 'how_it_works' ).style.display = "block";
}