function changeFontSize(element,step) {
 	var el = document.getElementById(element);
	var step = parseInt(step,10);
	var curFont = parseInt(el.style.fontSize,10);
	var curHeight = parseInt(el.style.lineHeight,10);
	//alert(el.style.fontSize);
	el.style.fontSize = (curFont+step) + 'pt';
	el.style.fontSize = (curHeight+step) + 'pt';
	
	/*switch(size) {
 		case "small":
	 		content.style.fontSize = '.8em';
	 		break;

	 	case "normal":
	 		content.style.fontSize = '1em';
	 		break;


	 	case "large":
			content.style.fontSize = '1.4em';
			break;
		}*/
}