Random Monster RPG Problem

I have just tried to program my random monster AS but it doesnt seem to work… it would be nice if someone could point out a couple of flaws for me. [AS] function Monster() {
temp = Math.floor(Math.random() * (100 - 0)) + 0;
if (temp = 25 or temp < 25){
((Monster == “Grey”))
}
else if (temp < 51 && temp > 25){
((Monster == “Blue”))
}
else if (temp < 76 && temp > 50){
((Monster == “Green”))
}
else if (temp > 76){
((Monster == “Black”))
}
}
setInterval(Monster, 0); [/AS]