does this look right to people

[javadoc]

/ / To find the average of two numbers var 1stNumber, 2ndNumber,
answer;
1stNumber = window. prompt( 'Enter number 1' , ' ') ;
1stNumber =parseFloat (1stNumber);
2ndNumber = window.prompt ( 'Enter number 2' , ' ') ;
2ndNumber = parseFloat (2ndNumber) ; answer = 1stNumber + 2ndNumber /
2; document.write
( 'The average of' 1stNumber and 2ndNumber ' is ' answer)

[Lee]

javadoc said:

/ / To find the average of two numbers var 1stNumber, 2ndNumber,
answer;
1stNumber = window. prompt( 'Enter number 1' , ' ') ;
1stNumber =parseFloat (1stNumber);
2ndNumber = window.prompt ( 'Enter number 2' , ' ') ;
2ndNumber = parseFloat (2ndNumber) ; answer = 1stNumber + 2ndNumber /
2; document.write
( 'The average of' 1stNumber and 2ndNumber ' is ' answer)

No.
Variable names shouldn't start with numbers.
Division has higher precedence than addition, so your expression
would produce the first number plus half of the second number.
You can use parentheses to force the addition to happen first.

[Bart Van der Donck]

javadoc wrote :

/ / To find the average of two numbers var 1stNumber, 2ndNumber,
answer;
1stNumber = window. prompt( 'Enter number 1' , ' ') ;
1stNumber =parseFloat (1stNumber);
2ndNumber = window.prompt ( 'Enter number 2' , ' ') ;
2ndNumber = parseFloat (2ndNumber) ; answer = 1stNumber + 2ndNumber /
2; document.write
( 'The average of' 1stNumber and 2ndNumber ' is ' answer)

There are a number of syntax errors in your code.
Here is a correct version:

FirstNumber=window.prompt('Enter number 1','')
FirstNumber=parseFloat(FirstNumber)
SecondNumber=window.prompt('Enter number 2','')
SecondNumber=parseFloat(SecondNumber)
answer=(FirstNumber+SecondNumber)/2
document.write('The average of '+FirstNumber+' and '+SecondNumber)
document.write(' is '+answer)

Bart