Why does this print nothing?

I am following there instructions to get a chart up and running and i cant开发者_如何转开发 seem to see why this chart is not displaying the data...maybe its late and i cant see the problem

 https://chart.googleapis.com/chart?cht=lc&chs=200x125&chxt=x,y&chxp=1,10,35,75&chxl=0:|Jan|Feb|March|April|May|1:|Min|Mid|Max

it needs to be:

https://chart.googleapis.com/chart?cht=lc&chs=200x125&chxt=x,y&chxp=1,10,35,75&chxl=0:|Jan|Feb|March|April|May|1:|Min|Mid|Max

You have the & instead of just &.