You could release everything (isn't hard to rip btw)
But you should release the download, the js file, etc...
There's a config there what could be usefull for who is gonna use it (not me, I think this call a lot of attention)
Code:
// Set the number of snowflakes (more than 30 - 40 not recommended)
var snowmax=50
// Set the colors for the snow. Add as many colors as you like
var snowcolor=new Array("#ffffff","#e0f9ff","#c4f5ff")
// Set the fonts, that create the snowflakes. Add as many fonts as you like
var snowtype=new Array("Times","Arial","Times","Verdana")
// Set the letter that creates your snowflake (recommended: * )
var snowletter="*"
// Set the speed of sinking (recommended values range from 0.3 to 2)
var sinkspeed=0.6
// Set the maximum-size of your snowflakes
var snowmaxsize=30
// Set the minimal-size of your snowflakes
var snowminsize=8
// Set the snowing-zone
// Set 1 for all-over-snowing, set 2 for left-side-snowing
// Set 3 for center-snowing, set 4 for right-side-snowing
var snowingzone=1