function numbersonly(e, decimal) {
	var key;
	var keychar;
	
	if (window.event) {
		key = window.event.keyCode;
	}
	else if (e) {
		key = e.which;
	}
	else {
		return true;
	}
	
	keychar = String.fromCharCode(key);
	
	if ((key==null) || (key==0) || (key==8) ||  (key==9) || (key==13) || (key==27) ) {
		return true;
	}
	else if ((("0123456789").indexOf(keychar) > -1)) {
		return true;
	}
	else if (decimal && (keychar == ".")) { 
		return true;
	}
	else{
		return false;
	}
}


function txtOn(obj){
	obj.style.borderColor ="#ff6600";
}
function txtOff(obj){
	obj.style.borderColor ="#cccccc";
}


function fgn_no_chksum(reg_no) {
    var sum = 0;
    var odd = 0;
    
    buf = new Array(13);
    for (i = 0; i < 13; i++) buf[i] = parseInt(reg_no.charAt(i));

    odd = buf[7]*10 + buf[8];
    
    if (odd%2 != 0) {
      return false;
    }

    if ((buf[11] != 6)&&(buf[11] != 7)&&(buf[11] != 8)&&(buf[11] != 9)) {
      return false;
    }
     
    multipliers = [2,3,4,5,6,7,8,9,2,3,4,5];
    for (i = 0, sum = 0; i < 12; i++) sum += (buf[i] *= multipliers[i]);


    sum=11-(sum%11);
    
    if (sum>=10) sum-=10;

    sum += 2;

    if (sum>=10) sum-=10;

    if ( sum != buf[12]) {
        return false;
    }
    else {
        return true;
    }
}