function checnum(as)
{
	var dd = as.value;
	
	if(isNaN(dd))
	{
		dd = dd.substring(0,(dd.length-1));
		as.value = dd;
	}		
}

function loan(er)
{
	var a = document.first.aa.value;
	var b = document.first.bb.value;
	var c = document.first.cc.value;
	var qw=a;
	var n = c * 12;
	var r = b/(12*100);
	var p = (a * r *Math.pow((1+r),n))/(Math.pow((1+r),n)-1);
	var prin = Math.round(p*100)/100;
	var dff = new Array;
	dff[0] = er*a/100;
	a = qw-dff[0];
	var p = (a * r *Math.pow((1+r),n))/(Math.pow((1+r),n)-1);
	var prin = Math.round(p*100)/100;
	dff[1] = prin;
	return dff;
}

function loanof()
{
	
	
	var sds = new Array(0,1,3,5,10,15,20);
	for(var e=0; e<sds.length; e++){
		var ed = loan(sds[e]);
		var g=e+1;
		var sd = eval("document.first.a"+g);
		sd.value=ed[0];
		eval("document.first.b"+g).value=ed[1];

	}
}
	
		


function color(test)
{

	for(var j=2; j<10; j++)
	{
		var myI=document.getElementsByTagName("input").item(j);
		//myI.setAttribute("style",ch);
		myI.style.backgroundColor=test;
	}
}


function color1(test)
{
var myI=document.getElementsByTagName("table").item(0);
//myI.setAttribute("style",ch);
myI.style.backgroundColor=test;
}