function Trim(s) {
  var temp = " ";
  var i = 0;
  while ((temp == " ") && (i <= s.length)) {
    temp = s.charAt(i);
    i++;
  }
  s = s.substring(i - 1, s.length);
  return(s);
}

function replaceAll(str, from, to) {
  var idx = str.indexOf(from);
  while (idx > -1)  {
  	str = str.replace(from, to);
		idx = str.indexOf(from);
  }
  return str;
}


function RequiredField(val) {
    var value = Trim(val);
    if(value=="") {
        return false;
    }
    return true;
}


function EmailValidate(val) {
    if(val==""){
        return true;
        //Can be return false; if you want to validate "cannot be blank value"
    }
    var value = Trim(val);
    var emailPat=/^(.+)@(.+)$/;
    var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
    var validChars="\[^\\s" + specialChars + "\]";
    var quotedUser="(\"[^\"]*\")";
    var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
    var atom=validChars + '+';
    var word="(" + atom + "|" + quotedUser + ")";
    var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
    var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
    var matchArray=value.match(emailPat);
    if (matchArray==null) {
        return false;
    }
    var user=matchArray[1];
    var domain=matchArray[2];
    if (user.match(userPat)==null){
        return false;
    }
    return true;
}


function RangeNumber(val,op,std1,std2){
	if(val==""){
		return true ;
	}
	if((op=="=") && (val==std1)){
		return true ;
	}
	if((op==">=") && (val>=std1)){
		return true ;
	}
	if((op==">") && (val>std1)){
		return true ;
	}
	if((op=="<=") && (val<=std1)){
		return true ;
	}
	if((op=="<") && (val<std1)){
		return true ;
	}
	if((op=="!=") && (val!=std1)){
		return true ;
	}
	if((op=="><") && (val>=std1)&& (val<=std2)){
		return true ;
	}
	return false ;
}


function NumberValidate(val) {
    if(val==""){
        return true;
    }
    var value = val;
    value = replaceAll(value, ',','');
    if (!isFinite(value)) {
        return  false;
    }
    return true;
}


function IntValidate(val) {
    if(val==""){
        return true;
    }
    var value = val;
    value = replaceAll(value, ',','');
    if (!isFinite(value)) {
        return  false;
    }
    value = value.split('.').length-1 ;
    if (value>0) {
        return false;
    }
    return true;
}


function LengthStr(val,op,size1,size2) {
  if(val==""){
    return true;
  }
  var value = Trim(val);
  if((op==">") && (value.length>size1)) {
    return true;
  }
  if((op==">=") && (value.length>=size1)) {
    return true;
  }
  if((op=="<") && (value.length<size1)) {
    return true;
  }
  if((op=="<=") && (value.length<=size1)) {
    return true;
  }
  if((op=="=") && (value.length==size1)) {
    return true;
  }
  if((op=="!=") && (value.length!=size1)) {
    return true;
  }
  if((op=="><") && (value.length>=size1) && (value.length<=size2)) {
    return true;
  }
    return false;
}