/*** Validation Functions ***/

function isValidEmail(address){
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   return reg.test(address);
}

function isAlphaNumeric(val){
    if (val.match(/^[a-zA-Z0-9 ,-]+$/)){
        return true;
    }
    else{
        return false;
    }
}

function isInteger(s){   var i;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);  
        if (((c < "0") || (c > "9"))) return false;
    }
    return true;
}

function isPhoneNumber(s){
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);  
        if(c == " " || c == "+" || c == "(" || c == ")"){
        
        }
        else{
            if ( (c < "0") || (c > "9") ) return false;
        }
    }
    return true;
}