JS Imgur.com Random Image Gallery Generator SRC

<script>
function GenImGurImage()
{
var amm1=0;
var amm=prompt("Enter # Of Images To Generate:");
var text = "";
var possible="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz012345678";
while(amm1!=amm){
amm1++;
for( var i=0; i < 5; i++ )
text += possible.charAt(Math.floor(Math.random() * possible.length));
document.write("<img src=http://i.imgur.com/"+text+".jpg></img>");
text="";
}
}
GenImGurImage()
</script>