function 
calculateTotal(inputItem){with(inputItem.form){if(inputItem.type=="radio"){calculatedTotal.value=eval(calculatedTotal.value)-eval(previouslySelectedRadioButton.value);previouslySelectedRadioButton.value=eval(inputItem.value);calculatedTotal.value=eval(calculatedTotal.value)+eval(inputItem.value);}else{if(inputItem.checked==false){calculatedTotal.value=eval(calculatedTotal.value)-eval(inputItem.value);}else{calculatedTotal.value=eval(calculatedTotal.value)+eval(inputItem.value);}}
if(calculatedTotal.value<0){InitForm();}
return(formatCurrency(calculatedTotal.value));}}
function formatCurrency(num){num=num.toString().replace(/\$|\,/g,'');if(isNaN(num))
num="0";sign=(num==(num=Math.abs(num)));num=Math.floor(num*100+0.50000000001);cents=num%100;num=Math.floor(num/100).toString();if(cents<10)
cents="0"+cents;for(var i=0;i<Math.floor((num.length-(1+i))/3);i++)
num=num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));return(((sign)?'':'-')+''+num+'.'+cents);}
function 
InitRealTimeCalculate(){document.selectionForm.item_price_1.value='0.0';document.selectionForm.calculatedTotal.value=0;document.selectionForm.previouslySelectedRadioButton.value=0;for(i=0;i<document.selectionForm.elements.length;i++){if(document.selectionForm.elements[i].type=='checkbox'|document.selectionForm.elements[i].type=='radio'){document.selectionForm.elements[i].checked=false;}}}