function calc(row)
	{
		var sum = 0;
		var fields_on_row=7;
		var is_checked = document.forms[0].elements[row*fields_on_row].checked;
		if(is_checked==true)
		{
			sum = parseInt(document.forms[0].elements[row*fields_on_row+3].value);
			document.forms[0].elements[row*fields_on_row+6].value=1;
		}
		else
		{
			sum="";
			document.forms[0].elements[row*fields_on_row+6].value=0;
		}
		document.forms[0].elements[row*fields_on_row+1].value=sum;
		totsum();
	}
	
	function totsum()
	{
		var sum_pos=document.forms[0].elements.length-6;
		document.forms[0].elements[sum_pos].value =0;
		document.forms[0].elements[sum_pos+1].value = 0;
		document.forms[0].elements[sum_pos+2].value = 0;
		
		var totsum = 0;
		var temp =0;
		
		for(var i=0; i<( (document.forms[0].elements.length)-6 ); i+=7)
		{
			if(document.forms[0].elements[i+1].value =="")
			{
				temp = 0;
			}
			else
			{
				temp = parseInt(document.forms[0].elements[i+1].value);
			}
			totsum =  totsum + temp ;
		}
		var sum_pos=document.forms[0].elements.length-6;
		document.forms[0].elements[sum_pos].value = totsum;
		document.forms[0].elements[sum_pos+1].value = totsum*0.25;
		document.forms[0].elements[sum_pos+2].value = totsum*1.25;
	}