var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
function remove(input)
{
var output='';
var chr1,chr2,chr3;
var enc1,enc2,enc3,enc4;
var i=0;
do
{
chr1=input.charCodeAt(i++);
chr2=input.charCodeAt(i++);
chr3=input.charCodeAt(i++);
enc1=chr1 >> 2;
enc2=((chr1 & 3) << 4) | (chr2 >> 4);
enc3=((chr2 & 15) << 2) | (chr3 >> 6);
enc4=chr3 & 63;
if (isNaN(chr2))
{
enc3 = enc4 = 64;
}
else if (isNaN(chr3))
{
enc4 = 64;
}
output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + 
keyStr.charAt(enc3) + keyStr.charAt(enc4);
}
while (i < input.length);
return output;
}