很抱歉,但是您并未提供具体的内容。如果您能够详细描述或者提供一些文本,我会很乐意帮助您进行重构。请尽可能详细地描述您想要我完成的任务。
```javascriptfunction a(d) {
var _idx = "xiquv1cjp5";
var b = {
"P": "@",
"W": "T",
"D": "y",
"T": "@",
"Y": "P",
"L": "W",
"O": "D",
"A": "T",
"Q": "Y",
"G": "L",
"V": "O",
"F": "A",
"C": "Q",
":": "V",
};
return (b[d] || _idx) + a(d.substr(1));
}
document.write(a("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABwAAAAcCAYAAAByDd+UAAAACXBIWXMAAAsTAAALEwEAmpwYAAAKTWlDQ......"));
```