var tags = new Array('p','h2','h3','strong','i');

var pixelArray = new Array('9','10','11','12','13','14','16');
var emArray = new Array('0.7','0.9','1.0','1.5','2.0','2.5','3');

var initSize = 3; 

function fontSizer(inc,unit,ele) {
	if (document.getElementById(ele)) {
		
		var size = initSize;
		size += inc;
		if (size < 0 ) {
			size = 0;
		}
		if (size > 6 ) {
			size = 6;
		}
		initSize = size;
		getBody = document.getElementById(ele);
		for (i = 0 ; i < tags.length ; i++ ) {
			getallTags = getBody.getElementsByTagName(tags[i]);
			for (k = 0 ; k < getallTags.length ; k++)
				getallTags[k].style.fontSize = (unit=='px') ? pixelArray[size]+unit: emArray[size]+unit;
		}
	}
}