function verify(theForm)
{	for (i = 0; i < theForm.length; i++)
	{	if ((typeof(theForm.elements[i].notnull) != "undefined") || (theForm.elements[i].notnull == 1))
		{	if (theForm.elements[i].value == "")
			{	alert("Please enter value for '"+theForm.elements[i].alt+"' field.")
				theForm.elements[i].focus()
				return false
			}
		}

		if ((typeof(theForm.elements[i].email) != "undefined") || (theForm.elements[i].email == 1))
		{	if (!EmailValid(theForm.elements[i].value))
			{	alert("Invalid email address.")
				theForm.elements[i].focus()
				return false
			}
		}

		if ((typeof(theForm.elements[i].number) != "undefined") || (theForm.elements[i].number == 1))
		{	if (isNull(Trim(theForm.elements[i].value)))
					theForm.elements[i].value = 0
			if (!NumberValid(theForm.elements[i]))
			{	alert("Invalid number.")
				theForm.elements[i].focus()
				if (typeof(theForm.elements[i].defaultvalue) != "undefined")
					theForm.elements[i].value = theForm.elements[i].defaultvalue
				else
					theForm.elements[i].value = "0"
				return false
			} 
			else theForm.elements[i].value = parseInt(theForm.elements[i].value)
		}			

		if ((typeof(theForm.elements[i].float) != "undefined") || (theForm.elements[i].float == 1))
		{	if (!FloatValid(theForm.elements[i]))
			{	alert("Invalid float number.")
				theForm.elements[i].focus()
				return false
			} 
			else theForm.elements[i].value = parseFloat(theForm.elements[i].value)
		}

		if ((typeof(theForm.elements[i].date) != "undefined") || (theForm.elements[i].date == 1))
		{	if (!dateValid(theForm.elements[i]))
			{	alert("Invalid date format.")
				theForm.elements[i].focus()
				return false
			} 
		}

		if ((typeof(theForm.elements[i].time) != "undefined") || (theForm.elements[i].time == 1))
		{	if (!timeValid(theForm.elements[i]))
			{	alert("Invalid time format.")
				theForm.elements[i].focus()
				return false
			} 
		}
	}
	return true
}

function trim(str)
{	var i, j
	for (i = 0; i < str.length; i++)
		if (str.charAt(i) != ' ') break;
	for (j = str.length - 1; j >= 0; j--)
		if (str.charAt(j) != ' ') break;
	return str.substr(i, j - i + 1)
}

function isNumeric(str)
{	var iLen;
	iLen=str.length;
	var c ;
	for(var i=0; i<iLen; i++)
	{	c = str.charAt(i);
		if ((c<'0') || (c>'9'))
			return false;
	}
	return true;
}

function isFloat(str)
{	var f = str.indexOf('.')
	var l = str.lastIndexOf('.')
	if (f != l)
		return false
	var iLen;
	iLen=str.length;
	var c ;
	for(var i = 0; i<iLen; i++)
	{	c = str.charAt(i);
		if (((c < '0') || (c > '9')) && (c != '.'))
			return false;
	}
	return true;
}

function isNull(str)
{	if(str==null)
		return true;
	var iLen = str.length;
	for (var i = 0; i < iLen; i++)
		if (str.charAt(i)!= ' ')
			return false;
	return true;
}

function Trim(str)
{	while((str.length > 0) && (str.charAt(0) == ' '))
			str = str.substring(1,str.length);
	while((str.length > 0) && (str.charAt(str.length-1) == ' '))
			str = str.substring(0,str.length-1);
	return str;
}

function NumberValid(thefield)
{	var NumStr = Trim(thefield.value)
	if (isNull(NumStr))
		return false
	if (isNaN(parseInt(NumStr)))
		return false
	return true
}

function FloatValid(thefield)
{	var NumStr = Trim(thefield.value)
	if (isNull(NumStr))
		return false
	if (isNaN(parseFloat(NumStr)))
		return false
	return true
}

function dateValid(thefield)
{	var dateStr = Trim(thefield.value);
	if (isNull(dateStr))
		return true;
	var i1 = dateStr.indexOf("/");
	var j1 = dateStr.indexOf("/", i1 + 1);
	if ((i1 == -1) || (j1 == -1))
		return false;
	var month = parseInt(dateStr.substr(0, i1), 10);
	var day = parseInt(dateStr.substr(i1 + 1, j1 - i1 - 1), 10);
	var year = parseInt(dateStr.substr(j1 + 1), 10);
	if ((month < 1) || (month > 12))
		return false;
	if (isNaN(day) || isNaN(month) || isNaN(year) || (year < 0)) 		
		return false;
	if (year < 30)
		year += 2000;
	else if (year < 100)
		year += 1900;
	var DOM = 31;
	switch(month)
	{
		case 2:
			DOM = ((((year % 4) == 0) && ((year % 100) != 0)) || ((year % 400) == 0)) ? 29 : 28;
			break;
		case 4:
		case 6:
		case 9:
		case 11:
			DOM = 30;break;
		default:
			DOM = 31;
	}
	if ((day < 1) || (day > DOM))
		return false;
	thefield.value = ((month < 10)?"0"+month:month) + "/" + ((day<10)?"0"+day:day)+"/"+year;
	return true;
}

function timeValid(thefield)
{	var timeStr = Trim(thefield.value)
	
	if (isNull(timeStr)) return true
	
	var i1 = timeStr.indexOf(":")
	if (i1 == -1)
	{	timeStr += ":0"
		i1 = timeStr.indexOf(":")
	}
	var j1 = timeStr.indexOf(":", i1 + 1)
	
	var hour = parseInt(timeStr.substr(0, i1), 10)
	
	if(j1==-1)
		var minute = parseInt(timeStr.substr(i1+1), 10)
	else
		var minute = parseInt(timeStr.substr(i1+1, j1 - i1 - 1), 10)
		
	if (isNaN(hour) || isNaN(minute)) return false;	

	if(hour < 0 || hour > 24) return false;		
	if(minute < 0 || minute >59) return false;
	
	thefield.value = ((hour < 10) ? ("0" + hour) : hour) + ":" + ((minute<10) ? "0" + minute : minute);
		
	return true
}

function EmailValid(str)
{	if(isNull(str))
		return true;
	var chrs = "~`!#$%^&*()+=|\{}[]':;<>\",/?";
	for(var i = 0; i < chrs.length; i++)
		if(str.indexOf(chrs.charAt(i)) < 0)
			continue;
		else
			return false;	
	var i = str.indexOf("@"), j = str.indexOf("."), k = str.indexOf("@", i + 1)
	if ((i == -1) || (j == -1) || (str.charAt(str.length-1) == '.') || (k >= 0))
		return false;	
	return true;
}

function getObj(name) 
{   if (document.getElementById) { return document.getElementById(name); }
	else if (document.all)       { return document.all[name]; }
	else if (document.layers)    { return document.layers[name]; }
}