/*
Copyright © 2005 fishfriend.com, Leon Huang. All Rights Reserved.
Users are prohibited from modifying, copying, distributing, transmitting, displaying, publishing, 
selling, licensing, creating derivative works or using any part of this JavaScript for commercial 
or public purposes.
*/

<!--
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' must contain an e-mail address.\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' is required.\n'; }
  } if (errors) alert('The following error(s) occurred:\n'+errors);
  document.MM_returnValue = (errors == '');
}

function MM_callJS(jsStr) { //v2.0
  return eval(jsStr)
}

function ClearList() {
  for (var i=document.forms[1].lstResults.options.length-1; i>=0; i--){
    document.forms[1].lstResults.options[i] = null;
  }
  document.forms[1].lstResults.selectedIndex = -1;
}

function Calc_volume() {
	var intLength, intWidth, intHeight, intVolume, strUnit;

	//Get measurements
	intLength = document.forms[1].txtLength.value;
	intWidth = document.forms[1].txtWidth.value;
	intHeight = document.forms[1].txtHeight.value;

	//Get measurements unit
	for (var i=0; i<document.forms[1].rgrpUnit.length; i++)  {
		if (document.forms[1].rgrpUnit[i].checked)  {
			strUnit = document.forms[1].rgrpUnit[i].value
		}
	}

	//Convert to cm
	switch (strUnit) {
		case "inch":
			intLength = intLength * 2.54;
			intWidth = intWidth * 2.54;
			intHeight = intHeight * 2.54;
			break;
		case "ft":
			intLength = intLength * 30.48;
			intWidth = intWidth * 30.48;
			intHeight = intHeight * 30.48;
			break;
	}

	//Calculate volume
	intVolume = (intLength * intWidth * intHeight) / 1000

	//Get volume unit
	for (var i=0; i<document.forms[1].rgrpVolUnit.length; i++)  {
		if (document.forms[1].rgrpVolUnit[i].checked)  {
			strUnit = document.forms[1].rgrpVolUnit[i].value
		}
	}
	
	//Convert volume
	switch (strUnit) {
		case "litre":
			strUnit = " litres";
			break;
		case "usgallon":
			intVolume = intVolume * 0.264172051;
			strUnit = " gallon(US)";
			break;
		case "ukgallon":
			intVolume = intVolume * 0.219969157;
			strUnit = " gallon(UK)";
			break;
	}

	//Round off results
	intVolume = Math.floor(intVolume * 100) / 100;

	//Display results
	document.forms[1].txtVolume.value = intVolume + strUnit;
}

//-->