HP script and bullet script

Hi! I creating a HP script. The bullet what enter the player's trigger contain a string with a var called "damagepoints". The hp script has a "getdamage" integer. How can I access from the player object's HP script to the Bullet's script value? I try this in the HP script (unsucceful):

var bulletscript = other.GetComponent("bulletdamage"); //bulletdamage = bullet script name

var getdamage = bulletscript.damagepoints(); //try to get the damagepoints var.

Please help me. (sorry for bad english)