/* V A L I D A T E    F O R M */
function validateForm(validate) {
    var curr_field, fieldName, filterList, element, errno, tvalue, len;
    var missinginfo = '';
    var matchEmail =/email/i
    var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
    var matchField = /([a-zA-Z0-9]{1}[\w_]+[a-zA-Z0-9]{1})\[([\S]{0,})\]/i
    
    /*filters used*/
    var filter1 = /len/i //maximum length
    var filter2 = /numeric/i //numeric fields
    
    
    var checkList = validate.split(",");
    for( var z=0; z < checkList.length; z++ ) {
        //get the field name
        fieldName = checkList[z].replace(matchField,"$1");
        //get the field criterias
        curr_field = checkList[z].replace(matchField, "$2");
        element = document.getElementById(fieldName);
        
        //check if this field is the email field to use different filter
        if(matchEmail.test(fieldName)) {
            if( !filter.test(element.value) ) { errno = 3; } else { errno = 0; }
        } else {
            //check if field is blank
            if( element.value == '' ) {
                errno = 1;
            } else {
                filterList = curr_field.split(";");
                for( var f=0; f < filterList.length; f++ ) {
                    
                    tvalue = filterList[f].split("=");
                    if(filter1.test(filterList[f])) {//check field length
                        if(element.value.length > tvalue[1] ) { errno = 2; len=tvalue[1]; break; } else { errno = 0; }
                    } else if(filter2.test(filterList[f])){//check if field is numeric
                        if(!IsNumeric(element.value)) { errno = 4; break; } else { errno = 0; }
                    }
                }
            }
        }
        //ERRORS messages type
        if(errno==0){ //field is valid
            element.style.backgroundColor='#FFFFFF';
        }else if(errno==1) {//field is blank
            missinginfo += '\n - '+ capitalize(fieldName)+ ' is required';
            element.style.backgroundColor='#E3F0FF';
        }else if(errno==2) {//max characters permitted
            missinginfo += '\n - '+ capitalize(fieldName)+ ' Max. Characther allowed = '+len;
            element.style.backgroundColor='#E3F0FF';
        }else if(errno==3) {//invalid email
            missinginfo += '\n - '+ capitalize(fieldName)+ ' is not valid';
            element.style.backgroundColor='#E3F0FF';
        }else if(errno==4) {//numeric fields
            missinginfo += '\n - '+ capitalize(fieldName)+ ' is a numeric field';
            element.style.backgroundColor='#E3F0FF';
        }
    }
    if (missinginfo != '') {
        missinginfo = '_____________________________\n' + 'Please fill in the required fields:\n' +
        missinginfo + '\n_____________________________';
        alert(missinginfo);
        return false;
    } else {
        return true;
    }
    return false;
}

/*C O N V E R T   F I R S T   L E T T E R   T O    U P P E R C A S E*/
function capitalize(str) {
  var arr=str.split("");
  arr[0]=arr[0].toUpperCase();
  var s=arr.join("");
  return s;
}

/*C H E C K   I F   A   F I E L D   I S   N U M E R I C*/
function IsNumeric(sText){
    var ValidChars = "0123456789.";
    var IsNumber=true;
    var Char;

 
    for (i = 0; i < sText.length && IsNumber == true; i++) { 
        Char = sText.charAt(i); 
        if (ValidChars.indexOf(Char) == -1) {
            IsNumber = false;
        }
    }
   return IsNumber;
   
}