function ContentSize(size)
{
	var content = document.getElementById('content');
		if(!content){
			return;
		}
		var contentChild = content.childNodes;
		content.style.fontSize = size + 'px';
		//再对artibody div内的直接html节点设置fontSize属性
		for(var i = 0; i < contentChild.length; i++){
			if(contentChild[i].nodeType == 1){
				contentChild[i].style.fontSize = size + 'px';
			}
		}
 }