javascript 动态载入js文件

function
loadJS2(_jsFile,id){

var
oJS = document.getElementById(id);

if
(oJS!=
null
&& oJS.tagName.toLowerCase()==
"script"
)

document.getElementsByTagName(
"head"
).item(0).removeChild(oJS);

oJS = document.createElement(
'script'
);

oJS.setAttribute(
"language"
,
"JavaScript"
);

//oJS.setAttribute("charset","utf-8");

oJS.setAttribute(
"id"
,id);

oJS.setAttribute(
"src"
, _jsFile);

document.getElementsByTagName(
"head"
).item(0).appendChild(oJS);

}

//动态调整图片大小

function
resizeImg(obj) {

var
new_w = new_h = 0;

var
img =
new
Image();

img.src = obj.src;

if
(img.width>0) {

ori_w = img.width;

ori_h = img.height;

}

//预设宽和高 度

area_w = 130;

area_h = 98;

if
(ori_w>ori_h) {

new_w = ori_w>area_w?area_w:ori_w;

new_h = parseInt(ori_h*new_w/ori_w);

if
(new_h>area_h) {

new_h = area_h;

new_w = parseInt(ori_w*new_h/ori_h);

}

obj.zoomsize = new_w/ori_w *100;

}
else
{

new_h = ori_h>area_h?area_h:ori_h;

new_w = parseInt(ori_w*new_h/ori_h);

if
(new_w>area_w) {

new_w = area_w;

new_h = parseInt(ori_h*new_w/ori_w);

}

}

//alert(ori_w+"x" + ori_h + "->" + new_w+"x" + new_h);

if
(obj) {

obj.style.width = new_w+
"px"
;

obj.style.height = new_h+
"px"
;

}

return
{width: new_w, height: new_h, roomsize: obj.roomsize};

}