var langFarsi = true;
var farsikey = [	     
	0x0020, 0x0021, 0x061B, 0x066B, 0x00A4, 0x066A, 0x060C, 0x06AF,      
	0x0029, 0x0028, 0x002A, 0x002B, 0x0648, 0x002D, 0x002E, 0x002F,      
	0x06F0, 0x06F1, 0x06F2, 0x06F3, 0x06F4, 0x06F5, 0x06F6, 0x06F7,      
	0x06F8, 0x06F9, 0x003A, 0x06A9, 0x003E, 0x003D, 0x003C, 0x061F,      
	0x066C, 0x0624, 0x200C, 0x0698, 0x064A, 0x064D, 0x0625, 0x0623,      
	0x0622, 0x0651, 0x0629, 0x00BB, 0x00AB, 0x0621, 0x004E, 0x005D,      
	0x005B, 0x0652, 0x064B, 0x0626, 0x064F, 0x064E, 0x0056, 0x064C,            
	0x0058, 0x0650, 0x0643, 0x062C, 0x0698, 0x0686, 0x00D7, 0x0640,            
	0x067E, 0x0634, 0x0630, 0x0632, 0x06CC, 0x062B, 0x0628, 0x0644,            
	0x0627, 0x0647, 0x062A, 0x0646, 0x0645, 0x0626, 0x062F, 0x062E,            
	0x062D, 0x0636, 0x0642, 0x0633, 0x0641, 0x0639, 0x0631, 0x0635,            
	0x0637, 0x063A, 0x0638, 0x007D, 0x007C, 0x007B, 0x007E            
];            
            
function FKeyDown() {
	if (window.event.shiftKey && window.event.altKey) {
		langFarsi=!langFarsi;
		return false;
	}
	return true;
}

function FKeyPress() {
   var key = window.event.keyCode;
   if (key < 0x0020 || key >= 0x00FF)
      return;
   if (langFarsi) {
      var el = event.srcElement;
      var objRegExp = new RegExp("[A-Za-z\x27\x2C\x3B\x5B\x5C\x5D\x7C]");
      var validate_key = objRegExp.test(String.fromCharCode(key));
      if ((validate_key || (key==92)) && (key != 0x200C) && (el.value.lastIndexOf(String.fromCharCode(1740)) == el.value.length - 1) && el.value.length > 0) {
         el.value = el.value.slice(0, -1);
         el.value += String.fromCharCode(1610);
      }
      if (key == 0x0020 && window.event.shiftKey)
         window.event.keyCode = 0x200C;
      else
         window.event.keyCode = farsikey[key - 0x0020];
   }
   return true;
}

function addEventToFields()
{
	if (FControls != null)
	{
		for (i=0;i<FControls.length;i++)
		{
			FControlId = FControls[i];
			Control = window.document.getElementById(FControlId);
			if (Control != null)
			{
				Control.onkeypress= FKeyPress;
			}
		}
	}
}

function changeLanguage()
{
	langFarsi=!langFarsi;
	langFarsi?document.getElementById("chngLang").value="Change Language to English":document.getElementById("chngLang").value="تغيير زبان به فارسی";
	
	if (FControls != null)
	{
	
		for (i=0;i<FControls.length;i++)
		{
			FControlId = FControls[i];
			Control = window.document.getElementById(FControlId);
			if (Control != null)
			{
				langFarsi?Control.style.direction= "rtl":Control.style.direction= "ltr";
			}
		}		
	
        if (FControls.length > 0)
        {
            document.getElementById(FControls[0]).focus();
        }		
	}
}