function zoom_it(n) {  //zoom_it ÇÔ¼ö => n ¸¸Å­ ¾ç¼ö´Â ±Û²ÃÀ» Å©°Ô À½¼ö´Â ÀÛ°Ô
	if(n==0){
	  //Á¤ÀÇµÈ Ç׸ñÀ» »èÁ¦ÇÑ´Ù.
	  jQuery('#txt *[zoomconter*=on]').css({"font-size":"","line-height":""});	
    } else {	
		//±âº» Å©±â(defsize)¿¡ nÀ» ´õÇؼ­ defsize¿¡ ÀúÀå
		jQuery("#txt *").each(function(data){
			//#txt ¾ÈÀÇ font-size°ªÀ» °¡Á®¿Í¼­ n°ªÀ» ´õÇÑ´Ù.
			var font_resize = Number(jQuery(this).css("font-size").replace("px",""))+n;
			//#txt ¾ÈÀÇ line-height°ªÀ» °¡Á®¿Í¼­ n°ªÀ» ´õÇÑ´Ù.
			var line_height_resize = Number(jQuery(this).css("line-height").replace("px",""))+n;		
			
			//ÀçÁ¤ÀÇµÈ °ªÀ» ÀÔ·ÂÇÑ´Ù.
			jQuery(this).css({"font-size":font_resize+"px","line-height":line_height_resize+"px"}).attr("zoomconter","on");
		});
	}
}