js取滚动条的尺寸实例代码

function getScrollWith(){ 
var wrap = setAttributes(document.createElement(‘div‘),{ 
style : { 
width : ‘200px‘, 
height: ‘200px‘, 
overflow: ‘auto‘, 
position:‘absolute‘, 
visibility:‘hidden‘ 
} 
}) 
var inner = setAttributes(document.createElement(‘div‘),{ 
style : { 
width : ‘100px‘, 
height: ‘2000px‘ 
} 
}) 
document.body.appendChild(wrap); 
wrap.appendChild(inner); 
var w = wrap.offsetWidth - wrap.clientWidth; 
document.body.removeChild(wrap); 
wrap = null; 
inner = null; 
return w; 
} www.jbxue.com
function setAttributes(elem,opts){ 
for(var key in opts){ 
if(typeof opts[key] == ‘string‘){ 
elem[key] = opts[key]; 
}else{ 
if(!elem[key]){ 
elem[key] = {}; 
} 
setAttributes(elem[key],opts[key]); 
} 
} 
return elem; 
}