Question

Possible Duplicate:
How to use a variable in place of ID in jquery

I have the function called makeinvisible and one of the parameters is supposed to be a jQuery id selector for an image with id=testimage. JavaScript does not recognize it as such, hence the image does not become hidden.

function makeinvisible (imageid){
    $("#imageid").css("visibility","hidden")
}

$(document).ready(
    makeinvisible("testimage")
)

Any help appreciated!

Answer 1

The code as written is looking for an element with id=imageid.

Try:

function makeinvisible (imageid){

    $("#" + imageid).css("visibility","hidden")
 }

$(document).ready(
  makeinvisible("testimage")
)

Edit: Your document.ready call is also incorrect. The way you have it written makeinvisible is being executed immediately, not on document ready. It needs to be:

$(document).ready(function(){ makeinvisible("testimage"); });