$(function(){
	function w_var(){
		var win_w = $(window).width(), $body = $('body');

		if(win_w < 744){
			$body.removeClass();
			$body.addClass('m_var');
		}else if(win_w < 1279){
			$body.removeClass();
			$body.addClass('t_var');
		}else if(win_w > 1280){
			$body.removeClass();
			$body.addClass('p_var');
		} 
	}
	
	w_var();

	$(window).resize(function(){ 
		
		w_var()
		
	}).resize()


});