function conver(limit){
var size = "";
if( limit < 0.1 * 1024 ){ //如果小于0.1KB转化成B
size = limit.toFixed(2) + "B";
}else if(limit < 0.1 * 1024 * 1024 ){ //如果小于0.1MB转化成KB
size = (limit / 1024).toFixed(2) + "KB";
}else if(limit < 0.1 * 1024 * 1024 * 1024){ //如果小于0.1GB转化成MB
size = (limit / (1024 * 1024)).toFixed(2) + "MB";
}else{ //其他转化成GB
size = (limit / (1024 * 1024 * 1024)).toFixed(2) + "GB";
}
var sizestr = size + "";
var len = sizestr.indexOf("\.");
var dec = sizestr.substr(len + 1, 2);
if(dec == "00"){ //当小数点后为00时 去掉小数部分
return sizestr.substring(0,len) + sizestr.substr(len + 3,2);
}
return sizestr;
}