function stripBlanks(fld) {
	var result = "";
	
	for (i=0; i<fld.length; i++) 
	{
		if (fld.charAt(i) != " " || c > 0) 
			{result += fld.charAt(i);
		if (fld.charAt(i) != " ") 
		c = result.length;}
	}
	return result.substr(0,c);
}

var numb = '0123456789';
function isValid(parm,val) {
	if (parm == "") return true;
	for (i=0; i<parm.length; i++) 
		{
		if (val.indexOf(parm.charAt(i),0) == -1)
		return false;
		}
	return true;
	}

function isNum(parm) {
	return isValid(parm,numb);
}

var mth = new Array('','january','february','march','april','may','june','july','august','september','october','november','december');
var day = new Array(31,28,31,30,31,30,31,31,30,31,30,31);

function validateDate(fld,fmt,rng,tmp) {
	
	var dd, mm, yy;
	var today = new Date;
	var t = new Date;
	if (fld == '') 
	{	
		alert("Please enter a date value.");
		tmp.focus();
		return false;
	}
	
	fld = stripBlanks(fld);
	
	
	var d1 = fld.split('\/');
	if (d1.length != 3) 
		d1 = fld.split(' ');
	if (d1.length != 3) 
		{
		alert("Please use the ''/'' as the seperator for the date.");
		tmp.focus();
		return false;
		}
		
	if (fmt == 'u' || fmt == 'U') 
		{
		dd = d1[1]; 
		mm = d1[0]; 
		yy = d1[2];
		}
	else if (fmt == 'j' || fmt == 'J') 
		{
		dd = d1[2]; 
		mm = d1[1]; 
		yy = d1[0];
		}
	else if (fmt == 'w' || fmt == 'W')
		{
		dd = d1[0]; 
		mm = d1[1]; 
		yy = d1[2];
		}
	else 
		{
		return false;
		}
		
	n = dd.lastIndexOf('st');

	n = dd.lastIndexOf('nd');
	if (n > -1) 
		dd = dd.substr(0,n);
	
	n = dd.lastIndexOf('rd');
	if (n > -1) 
		dd = dd.substr(0,n);
		
	n = dd.lastIndexOf('th');
	if (n > -1) 
		dd = dd.substr(0,n);

	n = dd.lastIndexOf(',');
	if (n > -1) 
		dd = dd.substr(0,n);
	
	n = mm.lastIndexOf(',');
	
	if (n > -1) 
		mm = mm.substr(0,n);
	
	if (!isNum(dd)) 
		return false;
	
	if (!isNum(yy)) 
		return false;
	
	if (!isNum(mm)) 
	{
		var nn = mm.toLowerCase();
		for (var i=1; i < 13; i++) 
		{
    		if (nn == mth[i] || nn == mth[i].substr(0,3)) 
			{
			mm = i; i = 13;
			}
 	 	}
	}
	
	if (!isNum(mm)) 
		return false;
	dd = parseFloat(dd);
	mm = parseFloat(mm); 
	yy = parseFloat(yy);
	
	
	if (yy < 100) 
		yy += 2000;
	if (yy < 1980 || yy > 2050) 
		{
		alert("Invalid year, please enter a valid year (1980-2050).");
		tmp.focus();
		return false;
		}
		
	if (mm == 2 && (yy%400 == 0 || (yy%4 == 0 && yy%100 != 0))) 
		day[mm-1]++;
		
	if (mm < 1 || mm > 12) 
		return false;
		
	if (dd < 1 || dd > day[mm-1]) 
		return false;
	
	t.setDate(dd); 
	t.setMonth(mm-1); 
	t.setFullYear(yy);


	if (rng == 'p' || rng == 'P') 
	{
		if (t > today) 
		{
		alert("The date entered is greater then the current date.  Please enter a date that is today or earlier.");
		tmp.focus();
		return false;
		}
	}
	else if (rng == 'f' || rng == 'F') 
	{
		if (t < today) 
		{
		alert("The date entered is earleir then the current date.  Please enter a date that is after todays date.");
		tmp.focus();
		return false;
		}
			
	}
	else if (rng != 'a' && rng != 'A') 
		{
		alert("Unexpected error pertaining to the valid date parameter.");
		tmp.focus();
		return false;
		}
	return true;
}