var res;
var error_start='<table width="200" border="0" cellspacing="0" cellpadding="0"><tr><td width="20" height="20"></td><td width="5"></td><td class="div_error">';
var error_end='</td></tr></table>';
function pay_advance()
{
	var a1 = document.frm.a.value;
	var b1 = document.frm.b.value;
	var c1 = document.frm.c.value;
	document.getElementById('one').checked=false;
	document.getElementById('two').checked=true;	
	var c1 = c1-1;
	//alert(c1);
	var r = (1+(b1/1200));	 	
	var rate = (b1/1200);	
	var p = Math.pow(r,c1);	
	//alert('power'+p);
	var p1 = p-1;
	//alert(p1);
	var e = parseInt(p) + parseInt(a1);
	//alert(e);
	var e1 = rate*e;
	//alert('power - 1: '+e1);	
	var emi= (a1*p1)/e1;	
	//alert(emi);
	res=emi;
}

function pay_arrears()
{
	var a1 = document.frm.a.value;
	var b1 = document.frm.b.value;
	var c1 = document.frm.c.value;
	document.getElementById('one').checked=true;
	document.getElementById('two').checked=false;	
	var r = (1+(b1/1200));
	var rate = (b1/1200);
	var p = Math.pow(r,c1);	
	var p1 = p-1;
	var r1 = a1*p1;		
	var r2 =rate*p;	
	var emi = r1/r2;
	res=emi;
}
function calc_emi()
{
	//document.getElementById('hid12').style.display='block';
	var is_error=false;
	var emi_ty=true;
	var div_array=Array("div_loanamt","div_rateofint","div_period");
	var o = document.getElementById('one');
	var t = document.getElementById('two');
	if ((o.checked == false ) && (t.checked == false ))
	{
		emi_ty=false;
	}
	
		if (IsEmpty(document.frm.a,'text'))
		{
			//alert("Please Loan price");document.frm.a.focus();return false;
			is_error=true;
			alert("Please enter the loan amount.");
			document.frm.a.focus();
			return false;
			//thorw_error("Please enter the loan amount.","div_loanamt");
		}
		else if(ValidateNo(document.frm.a.value,"0"))
		{
			is_error=true;
			alert("Please enter a valid loan amount.");
			document.frm.a.focus();
			return false;
			//thorw_error("Please enter a valid loan amount.","div_loanamt");
			
		}
		else
		{
			if(!ValidateNo(document.frm.a.value,"1234567890."))
			{
				alert("Please enter a valid loan amount");document.frm.a.focus();return false;
				is_error=true;
				//thorw_error("Please enter a valid loan amount.","div_loanamt");
			}
			else
			{
				hide_div("div_loanamt");	
			}
		}
		
		if (IsEmpty(document.frm.b,'text'))
		{
			is_error=true;
			alert("Please enter an Rate of interest");
			document.frm.b.focus();
			return false;
			//thorw_error("Please enter the rate of interest.","div_rateofint");
		}
		else if(ValidateNo(document.frm.b.value,"0"))
		{
			is_error=true;
			alert("Please enter a valid rate of interest.");
			document.frm.b.focus();
			return false;
			thorw_error("Please enter a valid rate of interest.","div_rateofint");
			
		}
		else
		{
			if(!ValidateNo(document.frm.b.value,"1234567890."))
			{
				is_error=true;
				//thorw_error("Please enter a valid rate of interest.","div_rateofint");
				alert("Please enter a valid rate of interest.");document.frm.b.focus();return false;
			}
			else if (document.frm.b.value >= 100)
			{ 
				is_error=true;
				alert("Please enter a valid rate of interest.");document.frm.b.focus(); return false;
				//thorw_error("Please enter a valid rate of interest.","div_rateofint");
			}
			else
			{
				hide_div("div_rateofint");	
			}
		}

		if (IsEmpty(document.frm.c,'text'))
		{
			is_error=true;
			alert("Please enter loan period  of loan.");document.frm.c.focus();return false;
			//thorw_error("Please enter the period of loan.","div_period");
		}
		else if(ValidateNo(document.frm.c.value,"0"))
		{
			is_error=true;
			
			alert("Please enter loan period  of loan.");document.frm.c.focus();return false;
			//thorw_error("Please enter a valid period of loan.","div_period");
			
		}
		else
		{
			if(!ValidateNo(document.frm.c.value,"1234567890."))
			{
				is_error=true;
				alert("Please enter a valid period of loan.");document.frm.c.focus();return false;
				//thorw_error("Please enter a valid period of loan.","div_period");
			}
			
			else
			{
				hide_div("div_period");	
			}
		} 
		
		/*if ((o.checked == false ) && (t.checked == false ))
		{
			//alert("Please choose Payment in Arrears or Advances");
			is_error=true;
			thorw_error("Please select the EMI payment type.","div_emipaytyp");
			//document.frm.arrears.focus();
			//return false;
		}
		else
		{
			hide_div("div_emipaytyp");
		}*/
		
		if(is_error)
		{
			return false;
		}

		for(j=0;j<div_array.length;j++)	
		{
			if(document.getElementById(div_array[j]).style.display=='')	
			{
				document.getElementById(div_array[j]).style.display='none';
			}
		}
		var a = parseFloat(document.frm.a.value);
		var b = parseInt(document.frm.b.value);
		var c = parseInt(document.frm.c.value); 
		if(o.checked==true)
		{
			 pay_arrears();
		}
		else if(t.checked=true)
		{
			pay_advance();	
		}
		document.frm.emi.value = parseInt(round_decimals(res,2));
		words('emi','formatedloanAmount3','wordloanAmount3');
		return false;
	//}
}

function thorw_error(error_txt,div_id)
{
	var DivObj = (document.getElementById(div_id)) ? document.getElementById(div_id) : new Object;
	DivObj.innerHTML = error_start+error_txt+error_end;
	DivObj.style.display="";
}

function hide_div(div_id)
{
	var DivObj = (document.getElementById(div_id)) ? document.getElementById(div_id) : new Object;
	//DivObj.innerHTML = error_start+error_txt+error_end;
	DivObj.style.display='none';
}

function round_decimals(original_number, decimals) {
	//alert(original_number);
  var result1 = original_number * Math.pow(10, decimals)
  //alert(result1);
  var result2 = Math.round(result1)
  //alert(result2);
  var result3 = result2 / Math.pow(10, decimals)
  //alert(result3);
  return (result3)
}
function IsNumeric(obj)
   //  check for valid numeric strings 
   {
   var strValidChars = "0123456789";
   var strChar;
   var strChar_int='';
   var blnResult = true;
   var strString=obj.value;	
   var dpos=strString.indexOf(".");
   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
      {
         blnResult = false;
		 strChar_int=strString.substr(0,dpos);
		 obj.value=strChar_int;
		 break;
       }
	   
      }
   //return blnResult;
   }