///This function make disable the drop down list
function makeDisable(){
    var x=document.getElementById("no_of_memberships")
    x.disabled=true
}

///This function make enable the drop down list
function makeEnable(){
    var x=document.getElementById("no_of_memberships")
    x.disabled=false
}

//This function calculate the total cost
function calculateCharge(count){
    var totalCharge =  99.99+(29.99*count);	
	totalCharge = totalCharge.toFixed(2);	
    document.getElementById("totalcost").innerHTML="$"+round(totalCharge);
	document.getElementById("totalcharge").innerHTML="$"+round(totalCharge);
	document.getElementById("deductCharge").value=round(totalCharge);	
}

function setCost(optvalue,deft){
   if(deft=="0"){
      document.getElementById("totalcharge").innerHTML="$"+optvalue;
	  document.getElementById("deductCharge").value=optvalue;	
	  if(optvalue =='15.00'){
	   document.getElementById("term").value="Q";
	  }else{
	    document.getElementById("term").value="Y";	  
	  }	 	
    }else if(deft=="1"){	
	 document.getElementById("totalcharge").innerHTML="$"+optvalue;	
	 document.getElementById("totalcost").innerHTML="$"+optvalue;	
	 document.getElementById("deductCharge").value=optvalue;	
	}else if(deft=="2"){
	var count = document.getElementById("no_of_memberships").value;
	 totalCharge =  99.99+(29.99*count);	
	 document.getElementById("totalcharge").innerHTML="$"+round(totalCharge);	
	 document.getElementById("totalcost").innerHTML="$"+round(totalCharge);
	 document.getElementById("deductCharge").value=round(totalCharge);		 
	}
}


//This function will return a 2 place decimal rounded up or down accordingly: 

function round(num){
num = num.toString();
var split = num.split(".");
var dec = split[1].substr(0,3);
var dec1 = dec.match(/\d{2,2}/);
var dec2 = dec.match(/(\d$)/);
var rounded = (dec1 + "." + dec2[0]);
return split[0] + "." + Math.round(rounded);
}