// [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)
{

		var isIE8 = false;
		if (window.ActiveXObject) { // IE
			// http://www.javascriptkit.com/javatutors/navigator.shtml
			if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
				 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
				 if (ieversion>=8) 
				 {
				 	isIE8 = true;
				 }
				 else if (ieversion>=7) 
				 {
				 }
				 else if (ieversion>=6)
				 {
				 }
				 else if (ieversion>=5)
				 {
				 }
			}
		}
		
		if (!isIE8)
		{

			dFilterNum = dFilterStrip(textbox.value, dFilterMask);
			
			// changed by Leonardo after ||
			if (key==9 || (dFilterNum.length<=0 && ((key>47&&key<58)||(key>95&&key<106)||(key==8))))
			{
			    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) )
	        {
	        	if(key>95&&key<106){key-=48;} // line added by Leonardo
		        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;
}