// [dFilter] - A Numerical Input Mask for JavaScript
// Written By Dwayne Forehand - March 27th, 2003
// Please reuse & redistribute while keeping this notice.

var dFilterStep

function dFilterStrip (dFilterTemp, dFilterMask)
{
    dFilterMask = replace(dFilterMask,'#','');
    for (dFilterStep = 0; dFilterStep < dFilterMask.length++; dFilterStep++)
		{
		    dFilterTemp = replace(dFilterTemp,dFilterMask.substring(dFilterStep,dFilterStep+1),'');
		}
		return dFilterTemp;
}

function dFilterMax (dFilterMask)
{
 		dFilterTemp = dFilterMask;
    for (dFilterStep = 0; dFilterStep < (dFilterMask.length+1); dFilterStep++)
		{
		 		if (dFilterMask.charAt(dFilterStep)!='#')
				{
		        dFilterTemp = replace(dFilterTemp,dFilterMask.charAt(dFilterStep),'');
				}
		}
		return dFilterTemp.length;
}

function dFilter (key, textbox, dFilterMask)
{
		dFilterNum = dFilterStrip(textbox.value, dFilterMask);
		
		if (key==9)
		{
		    return true;
		}
		else if (key==8&&dFilterNum.length!=0)
		{
		 	 	dFilterNum = dFilterNum.substring(0,dFilterNum.length-1);
		}
 	  else if ( ((key>47&&key<58)||(key>95&&key<106)) && dFilterNum.length<dFilterMax(dFilterMask) )
		{
        dFilterNum=dFilterNum+String.fromCharCode(key);
		}

		var dFilterFinal='';
    for (dFilterStep = 0; dFilterStep < dFilterMask.length; dFilterStep++)
		{
        if (dFilterMask.charAt(dFilterStep)=='#')
				{
					  if (dFilterNum.length!=0)
					  {
				        dFilterFinal = dFilterFinal + dFilterNum.charAt(0);
					      dFilterNum = dFilterNum.substring(1,dFilterNum.length);
					  }
				    else
				    {
				        dFilterFinal = dFilterFinal + "";
				    }
				}
		 		else if (dFilterMask.charAt(dFilterStep)!='#')
				{
				    dFilterFinal = dFilterFinal + dFilterMask.charAt(dFilterStep); 			
				}
//		    dFilterTemp = replace(dFilterTemp,dFilterMask.substring(dFilterStep,dFilterStep+1),'');
		}


		textbox.value = dFilterFinal;
    return false;
}

function replace(fullString,text,by) {
// Replaces text with by in string
    var strLength = fullString.length, txtLength = text.length;
    if ((strLength == 0) || (txtLength == 0)) return fullString;

    var i = fullString.indexOf(text);
    if ((!i) && (text != fullString.substring(0,txtLength))) return fullString;
    if (i == -1) return fullString;

    var newstr = fullString.substring(0,i) + by;

    if (i+txtLength < strLength)
        newstr += replace(fullString.substring(i+txtLength,strLength),text,by);

    return newstr;
}

function isValidDate(dmyDate,doAlert,doFuture){
  var parts=dmyDate.split('.');
  var ret = true;
  var today = new Date;
  y = parseInt(parts[2],10);
  m = parseInt(parts[1],10);
  d = parseInt(parts[0],10);
  var dt = new Date(y, m-1, d);
  if (dt.getYear()<1000) {y=y-1900;}
//  alert (dt.getYear()+'='+y+' ' +dt.getMonth()+'='+m+' '+dt.getDate()+'='+d);
  if ((y == dt.getYear()) && ((m-1) == dt.getMonth()) && (d == dt.getDate())){
    ret = true;
  } else {
    if (doAlert) {alert ("Некорректная дата "+dmyDate);}
    ret = false;
  }
  
  if (dt>today && doFuture) {
    ret = false;
  }
  
  return ret;
}

function DateMask(MaskedDate,Separator){
  var ret = MaskedDate.value;
  
  ret = replace(ret,Separator,'');
//  alert (ret);
  var p1 = ret.substring(0,2);
//  alert (p1);
  var p2 = ret.substring(2,4);
//  alert (p2);
  var p3 = ret.substring(4,8);
//  alert (p3);
  ret = p1+Separator+p2+Separator+p3;
  if (isValidDate(ret,true,false)){
    MaskedDate.value = ret;
  } 
  
  return false;
}