If statement trouble

1

Hi folks!
I thought this was going to be straight forward…
I have 25 buttons in a grid on the stage named a0 - a24. When you click on a button in a particular row, I want to throw a number/letter combination into an array. I’m just starting out trying to get the code to determine which button was pressed and do a trace action. All it ever traces is the first trace “this button is an f”. What am I doing wrong??? my or’s are right aren’t they? ||

for(l=0;l<25;l++){
	_root["a"+l].onRelease = function(){
		if(this._name=="a0"||"a5"||"a10"||"a15"||"a20"){
			trace("this is an f button")
		}else if(this._name=="a1"||"a6"||"a11"||"a16"||"a21"){
			trace("this is an r button")
		}else if(this._name=="a2"||"a7"||"a12"||"a17"||"a22"){
			trace("this is an a button")
		}else if(this._name=="a3"||"a8"||"a13"||"a17"||"a23"){
			trace("this is a u button")
		}else if(this._name=="a4"||"a9"||"a14"||"a18"||"a24"){
			trace("this is a d button")
		}
}
}

Thanks for looking!