Help on C51 programming

Hi, i am currently working on the project on 8051. The software that i am using is keil uVision3.

i am writing a delay loop for my LED but there is a syntax error in the code. Below is the code:

(1) void delay_time(void)
(2) {
(3)     unsigned int a,b;
(4)     for(a=0, a<100, a++)
(5)             for(b=0, b<100, b++);
(6) }

and the syntax error is:

line(4): error C141: syntax error near ')'
line(5): error C141: syntax error near ')'

Can anyone help me on this?
Any help is greatly appreciated!