/*********************************
Calculator script
*********************************/

// JavaScript Document

function checkForm(form){
	if ((form.name.value == "(required)") || (form.email.value == "(required)")){
		alert("Please enter in all required fields");
		return false;
	}
	else
		return true;
}

function numeralsOnly(evt) {
	evt = (evt) ? evt : event;
	var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode : ((evt.which) ? evt.which : 0));
	if (charCode > 31 && (charCode < 48 || charCode > 57)) {
		alert("Enter numerals only in this field.");
		return false;
	}
	return true;
}

function MyCheckEnteredValue(element) {
	var lField = ltrim(rtrim(String(element.value)));
    myReg=new RegExp("^[$]?[0-9]*\\.?[0-9]*$"); 
	if (!(myReg.test(lField) && lField!='.' && lField!='$')) {
		alert("Only numeric values are allowed!");
		element.focus();
		element.select();
		return false;
	}
	return true;
}

function MyCheckEnteredValuePercent(element) {
	var lField = ltrim(rtrim(String(element.value)));
    myReg=new RegExp("^[0-9]*\\.?[0-9]*?$"); 
	if (!(myReg.test(lField) && lField!='.' )) {
		alert("Only numeric values are allowed ");
		return false;
	}

	//100% test
	if (parseFloat(lField)>100) {
		alert("Percentage values must be between 0 and 100!")
		return false;
	}
	return true;
}

function rtrim(argvalue) {
  while (1) {
    if (argvalue.substring(argvalue.length - 1, argvalue.length) != " ")
      break;
    argvalue = argvalue.substring(0, argvalue.length - 1);
  }
  return argvalue;
}

function ltrim(argvalue) {
  while (1) {
    if (argvalue.substring(0, 1) != " ")
      break;
    argvalue = argvalue.substring(1, argvalue.length);
  }
    return argvalue;
}

function round(number)
{
  return Math.round(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{   frm = document.temps;
	var mi = frm.IR.value / 1200;  
	var counter = 1;  
	var mcounter = 1 + mi;  
	for (i=0; i<frm.YR.value * 12; i++)  
	{   
		counter = counter * mcounter  
	}  
	frm.PI.value = round(frm.LA.value * mi / ( 1 - (1/counter)))  
	frm.MT.value = round(frm.AT.value / 12)  
	frm.MI.value = round(frm.AI.value / 12)  
	var dasum = frm.LA.value * mi / ( 1 - (1/counter)) + frm.AT.value / 12 + frm.AI.value / 12;
    frm.MP.value = round(dasum);
}

function validateForm(form){
	if (isNotEmpty(form.mlsid)) {
		return true;
	}
	else { return false; }
}
		
function isNotEmpty(elem){
	var str = elem.value;
	if (str == null || str.length == 0) {
		alert("Please fill in the required field.");
		return false;
	} else {
		return true;
	}
}


function submitForm(val){
	document.mlsform.start.value = val;
	document.mlsform.submit();
}

function listingSort(){
	document.mlsform.submit();
}