<!--

//initial checkCount of zero
var checkCount=0

//maximum number of allowed checked boxes
var maxChecks=5

function setChecks(obj){


//increment/decrement checkCount
if(obj.checked){

checkCount=checkCount+1
}else{
checkCount=checkCount-1
}
//if they checked a 4th box, uncheck the box, then decrement checkcount and pop alert
if (checkCount>maxChecks){
obj.checked=false;
checkCount=checkCount-1;

}

}
//-->