function isNum(args)
{
	args = args.toString();

	if (args.length == 0)
	return false;

	for (var i = 0;  i<args.length;  i++)
	{
		if ((args.substring(i,i+1) < "0" || args.substring(i, i+1) > "9") && args.substring(i, i+1) != "-")
		{
			return false;
		}
	}
	return true;
}

function check(df)
{
	var ad = df.value;
	if(isNaN(ad))
	{
		if(ad != "")
			ad = ad.substring(0,ad.length-1);

		df.value = ad;
	}
}

function changea(xaa)
{
	var dd = document.getElementsByTagName("select");
	for(var ff=0; ff<dd.length; ff++)
	{
		var sss = dd[ff];
		if(xaa.name != sss.name)
			sss.options[0].selected = true;
	}

	var cc = xaa.value;
	var aas = 1;
	mt = ara[cc];
	var mtval = mt*aas;
	var roun = 100000000;
	for(var i=0; i<ara.length; i++)
	{
		var ff = eval("document.first.a"+i);
		ff.style.backgroundColor = "#ffffff";
		if(i != cc)
		{
			if(mtval == 1 && ara[i] == .000000001){
				ff.value = 1000000000;
			}else if(cc != ""){
				ff.value = Math.round((mtval/ara[i])*roun)/roun;
			}
		}
		else
		{
			ff.value=1;
			ff.style.backgroundColor = "#bbc7dd";
		}
	}
}

function firs()
{
	document.first.a0.value = 1;
	changea(document.first.xxx);
}

function madd(ssa)
{
	var mt = 0;
	var xx = 0;

	var cc = eval("document.first."+ssa).value;
	var dd = eval("document.first.a"+cc);
	var aas = dd.value;

	var roun = document.first.roun.value;
	if(roun != "9")
		roun = Math.pow(10,roun);

	if(aas != "")
	{
		mt = ara[cc];

		var mtval = mt*aas;

		for(var i=0; i<ara.length; i++)
		{
			if(i != cc)
			{
				var ff = eval("document.first.a"+i);
				if(mtval == 1 && ara[i] == .000000001){
					ff.value = 1000000000;
				}else if(roun != "9"){
					ff.value = Math.round((mtval/ara[i])*roun)/roun;
				}else{
				      var dddd =  mtval/ara[i];
					if((dddd.toString()).indexOf('e') > 1)
					{
						 var result = (dddd.toString()).split("e");
						 dddd = Math.round(result[0]*10000)/10000+" e"+result[1];
					}
					ff.value = dddd;
				}
			}
		}			
	}

}

function changee(xx)
{
	var dad = document.getElementsByTagName("select");
	for(var ff=0; ff<dad.length; ff++)
	{
		var sss = dad[ff];
		if(xx.name != sss.name && sss.name != "roun")
			sss.options[0].selected = true;
	}

	var cc = xx.value;

	for(var x=0; x<ara.length; x++)
	{
		var ss = "document.first.a"+x;
		//alert(ss);
		var zz = eval(ss);
		//zz.setAttribute("disabled","true");
		zz.style.backgroundColor= "#ffffff";
		zz.style.border="1px #009bff solid";
		zz.style.color = "#000000";
	}

	var dd = eval("document.first.a"+cc);
	dd.removeAttribute("disabled");
	dd.style.backgroundColor= "#bbc7dd";
	dd.style.color = "#000000";
	dd.style.border="1px #009bff solid";
	dd.style.fontWeight="bold";
}