Posted
				
				by: 邱小新
				at 下午4:55:00
				in
				  
程式碼
 
 
有空再來寫說明
function fontZoom(size)
{
    var element = document.getElementsByTagName("span");
    for(i=0; i < element.length; i++) {
        attribute = element[i].getAttribute("name");
        if(attribute == "zoom") {
            if (element[i].style.fontSize == '') 
                element[i].style.fontSize = "14px";
            var fixsize = atoi(element[i].style.fontSize) + size;
            if (fixsize <= 0) fixsize = 14;
            element[i].style.fontSize = fixsize + "px";
        }
    }
}
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http://abintech.azhai.org/2007/01/blog-post.html
http://chenkaie.blogspot.com/2006/12/javascript-selectable-post-font-size.html
 
 
  
   
element[i].style.fontSize = parseInt(window.getComputedStyle(element[i], null).getPropertyValue('font-size')) + 1 + 'px';