var isDOM = (document.getElementById ? true : false);
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);

function getRef(id) {
	if (isDOM) return document.getElementById(id);
	if (isIE4) return document.all[id];
	if (isNS4) return document.layers[id];
}

function submitform(id){
	var frm = getRef(id);
	frm.submit();
}

function setStyle(objId, style, value) {
	document.getElementById(objId).style[style] = value;
}

function setStyle(obj, style, value) {
	obj.style[style] = value;
}

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;
}

Array.prototype.find = function(searchStr) {
  var returnArray = false;
  for (i=0; i<this.length; i++) {
    if (typeof(searchStr) == 'function') {
      if (searchStr.test(this[i])) {
        if (!returnArray) { returnArray = [] }
        returnArray.push(i);
      }
    } else {
      if (this[i]===searchStr) {
        if (!returnArray) { returnArray = [] }
        returnArray.push(i);
      }
    }
  }
  return returnArray;
}

Array.prototype.indexOf = function( v, b, s ) {
 for( var i = +b || 0, l = this.length; i < l; i++ ) {
  if( this[i]===v || s && this[i]==v ) { return i; }
 }
 return -1;
};

Array.prototype.nearest = function( val ) {
	var r = -1;
	for(var i = 0, l = this.length; i < l; i++){
		if(this[i] < val){
			r = i;
		}
	}
	return r+1;
};

Array.prototype.lastIndexOf = function( v, b, s ) {
 b = +b || 0;
 var i = this.length; while(i-->b) {
  if( this[i]===v || s && this[i]==v ) { return i; }
 }
 return -1;
};

Array.prototype.unique = function( b ) {
 var a = [], i, l = this.length;
 for( i=0; i<l; i++ ) {
  if( a.indexOf( this[i], 0, b ) < 0 ) { a.push( this[i] ); }
 }
 return a;
};


function getIncludePage(url, callbackFunction){
	if (window.XMLHttpRequest) {
		var request = new XMLHttpRequest();
	} else {
		var request = new ActiveXObject("MSXML2.XMLHTTP.3.0");
	}
	rnd = Math.random().toString().substring(2);
	url = url.indexOf('?')>-1 ? url+'&rnd='+rnd : url+'?rnd='+rnd;
	request.open("GET", url, true);
	request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
	request.onreadystatechange = function(){
		if (request.readyState == 4 && request.status == 200) {
			if (request.responseText){
				callbackFunction(request.responseText);
			}
		}
	}
	request.send('');
}