function ie(s){return((s==null)||(s.length==0));}
function isNumeric(strString) {
	var strValidChars = "0123456789.-";
	var strChar;
	var blnResult = true;
	if (strString.length == 0) return false;
	if (strString == "-") return false;
	for (i = 0; i < strString.length && blnResult == true; i++) {
		strChar = strString.charAt(i);
		if (strValidChars.indexOf(strChar) == -1) blnResult = false;
	}
	return blnResult;
}
function cNumber(str,min,max) {
	if(!isNumeric(str)) {
		alert("Please enter a numeric value");
		return false;
	} else if (str < min || str > max) {
		 alert("Please enter a numeric value between "+min+" to "+max+ " inclusive.");
		 return false;
	}
	return true;
}