function countMe(){
myForm=document.forms["formname"]
totalSelected=0
numOfBoxes=0

for(var i=0; i<myForm.length; i++){

if(myForm.elements[i].type=="checkbox"){
numOfBoxes++

if(myForm.elements[i].checked==true){
totalSelected++
}

}

}

myForm["t1"].value=(totalSelected+" out of "+(numOfBoxes)+" selected")

}