s/<(?:[^>'"]*|".*?"|'.*?')+script(?:[^<'"]*|".*?"|'.*?')+>.*?<(?:[^>'"
+]*|".*?"|'.*?')+\/.*?script(?:[^<'"]*|".*?"|'.*?')+>/<script><\/scrip
+t>/igsx;
[download]

Quick 'n dirty. But Ovid's solution is more reliable. Also I totally agree with cLive.