var tags = new Array('div', 'td', 'tr', 'p', 'b', 'span', 'table', 'strong', 'emphasis', 'a', 'h1', 'h2', 'h3', 'pre', 'sub', 'sup', 'i', 'th', 'cp', 'ul', 'ol', 'li', 'dt', 'dd','font');
var dSize = 11;
function fontSizerAll(el,inc,all,parent) {
	if (!document.getElementById) {
		return;
	}
	getBody = document.getElementById(el);
	for (i = 0 ; i < all.length ; i++ ) {
		getallTags = getBody.getElementsByTagName(all[i]);
		for (var k = 0 ; k < getallTags.length ; k++) {
			if (getallTags[k].currentStyle) {
				var size = getallTags[k].currentStyle['fontSize'];
				if (size.indexOf('pt') != -1) {
					if (screen.deviceXDPI) {
						var size = (screen.deviceXDPI)/72*parseInt(getallTags[k].currentStyle['fontSize']);
					} else {
						var size = 96*parseInt(getallTags[k].currentStyle['fontSize']);
					}
				}
			} else if (window.getComputedStyle) {
				var size = window.getComputedStyle(getallTags[k], '').getPropertyValue("font-size");
			} else {
				var size = getallTags[k].style.fontSize;
			}
			if (size == 0 || size == undefined || size == NaN) {
				size =dSize;
			}
			size = parseInt(size,10);
			if (inc == '+') {
				 size += 1;
			} else {
				size -= 1;
			}
			if (size < 6) {
				size = 6;
			}
			if (size > 25) {
				size = 25;
			}
			getallTags[k].style.fontSize = size+'px';
		}
	}
	if (parent) {
		if (getBody.currentStyle) {
			var size = getBody.currentStyle['fontSize'];
			if (size.indexOf('pt') != -1) {
				if (screen.deviceXDPI) {
					var size = (screen.deviceXDPI)/72*parseInt(getBody.currentStyle['fontSize']);
				} else {
					var size = 96*parseInt(getBody.currentStyle['fontSize']);
				}
			}
		} else if (window.getComputedStyle) {
			var size = window.getComputedStyle(getBody, '').getPropertyValue("font-size");
		} else {
			var size = getBody.style.fontSize
		}
		if (size == 0 || size == undefined || size == NaN) {
			size =dSize;
		}
		size = parseInt(size,10);
		if (inc == '+') {
			 size += 1;
		} else {
			size -= 1;
		}
		if (size < 6) {
			size = 6;
		}
		if (size > 25) {
			size = 25;
		}
		getBody.style.fontSize = size+'px';
	}
}