哪位高linux高手帮我改改下面的shell脚本程序，谢谢。

错误提示：
[root@LXQ heiying]# ./1-2-6 2 2
./1-2-6: line 4: if[-z2]: command not found
./1-2-6: line 4: [-z2]: command not found
./1-2-6: line 5: syntax error near unexpected token `then'
./1-2-6: line 5: `then'
[root@LXQ heiying]# vi 1-2-6 
[root@LXQ heiying]# ./1-2-6 2 2
./1-2-6: line 4: if[-z 2]: command not found
./1-2-6: line 4: [-z: command not found
./1-2-6: line 5: syntax error near unexpected token `then'
./1-2-6: line 5: `then'




源程序：  
  1 #!/bin/bash
  2 a=$1
  3 b=$2
  4 if[-z $a]||[-z $b]
  5 then
  6 echo "please enter 2 no"
  7 exit 1
  8 fi
  9 if[$a -eq $b];then
  10 echo "number a=number b"
  11 else if[$a -gt $b]
  12 then
  13 echo "number a>number b"

第四行4 if[-z $a]||[-z $b] 应该写成 if [ -z $a ] || [ -z $b ]
注意格式