function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}

function commadot(that) {
if (that.value.indexOf(",") >= 0) {
that.value = that.value.replace(/\,/g,".");
}
}

function ahah(url, target) {
  document.getElementById(target).innerHTML = '<center><br /><br /><img src="../images/loading.gif" /><br />Učitavanje podataka...<br /><br /><br /></center>';
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
    req.onreadystatechange = function() {ahahDone(url, target);};
    req.open("GET", url, true);
    req.send("");
  }
}  

function ahahDone(url, target) {
  if (req.readyState == 4) { // only if req is "loaded"
    if (req.status == 200) { // only if "OK"
      document.getElementById(target).innerHTML = req.responseText;
    } else {
      document.getElementById(target).innerHTML=" AHAH Error:\n"+ req.status + "\n" +req.statusText;
    }
  }
}

function load(name, div) {
	ahah(name,div);
	return false;
}

function extractNumber(obj, decimalPlaces, allowNegative)
{
	var temp = obj.value;
	
	// avoid changing things if already formatted correctly
	var reg0Str = '[0-9]*';
	if (decimalPlaces > 0) {
		reg0Str += '\\.?[0-9]{0,' + decimalPlaces + '}';
	} else if (decimalPlaces < 0) {
		reg0Str += '\\.?[0-9]*';
	}
	reg0Str = allowNegative ? '^-?' + reg0Str : '^' + reg0Str;
	reg0Str = reg0Str + '$';
	var reg0 = new RegExp(reg0Str);
	if (reg0.test(temp)) return true;

	// first replace all non numbers
	var reg1Str = '[^0-9' + (decimalPlaces != 0 ? '.' : '') + (allowNegative ? '-' : '') + ']';
	var reg1 = new RegExp(reg1Str, 'g');
	temp = temp.replace(reg1, '');

	if (allowNegative) {
		// replace extra negative
		var hasNegative = temp.length > 0 && temp.charAt(0) == '-';
		var reg2 = /-/g;
		temp = temp.replace(reg2, '');
		if (hasNegative) temp = '-' + temp;
	}
	
	if (decimalPlaces != 0) {
		var reg3 = /\./g;
		var reg3Array = reg3.exec(temp);
		if (reg3Array != null) {
			// keep only first occurrence of .
			//  and the number of places specified by decimalPlaces or the entire string if decimalPlaces < 0
			var reg3Right = temp.substring(reg3Array.index + reg3Array[0].length);
			reg3Right = reg3Right.replace(reg3, '');
			reg3Right = decimalPlaces > 0 ? reg3Right.substring(0, decimalPlaces) : reg3Right;
			temp = temp.substring(0,reg3Array.index) + '.' + reg3Right;
		}
	}
	
	obj.value = temp;
}
function blockNonNumbers(obj, e, allowDecimal, allowNegative)
{
	var key;
	var isCtrl = false;
	var keychar;
	var reg;
		
	if(window.event) {
		key = e.keyCode;
		isCtrl = window.event.ctrlKey
	}
	else if(e.which) {
		key = e.which;
		isCtrl = e.ctrlKey;
	}
	
	if (isNaN(key)) return true;
	
	keychar = String.fromCharCode(key);
	
	// check for backspace or delete, or if Ctrl was pressed
	if (key == 8 || isCtrl)
	{
		return true;
	}

	reg = /\d/;
	var isFirstN = allowNegative ? keychar == '-' && obj.value.indexOf('-') == -1 : false;
	var isFirstD = allowDecimal ? keychar == '.' && obj.value.indexOf('.') == -1 : false;
	
	return isFirstN || isFirstD || reg.test(keychar);
}

function handleEnter (field, event) {
		var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
		if (keyCode == 13) {
			var i;
			for (i = 0; i < field.form.elements.length; i++)
				if (field == field.form.elements[i])
					break;
			i = (i + 1) % field.form.elements.length;
			field.form.elements[i].focus();
			return false;
		} 
		else
		return true;
	} 

function preracunaj() {
	var dozvoljeno = 150;
	if (document.postavi_pitanje.pitanje.value.length > dozvoljeno) {
	        tekst_150 = document.postavi_pitanje.pitanje.value.substr(0,dozvoljeno);
	        //alert(tekst_150.length + "\n" + dozvoljeno)
		document.postavi_pitanje.pitanje.value = tekst_150;
		//alert("Ovo je length: " + document.mali_formularcic.tekst.value.length + "\nA ovo je dozvoljeno: " + dozvoljeno)
		}
	document.postavi_pitanje.max_slova.value = dozvoljeno - (document.postavi_pitanje.pitanje.value.length)

}


if (document.getElementById) {
 document.writeln('<style type="text/css"><!--')
 document.writeln('.texter {display:none}')
 document.writeln('//--></style>') }

function openClose(theID) {
 if (document.getElementById(theID).style.display == "block") { document.getElementById(theID).style.display = "none" }
 else { document.getElementById(theID).style.display = "block" } }

function change(text){
document.getElementById("pojam").innerHTML = text;
}

function deleteRow(r)
  {
  var i=r.parentNode.parentNode.rowIndex
  document.getElementById('tabela').deleteRow(i)
  }


function newsletter_newWindow(theURL,winName,features) { //v2.0
window.open(theURL,winName,features);
}

function clearvalue(field) 
{ 
if (field.defaultvalue == field.value) 
field.value = ""; 
} 


function tips() {
	Tooltip.init();
}

var myvar;
function menuinit() {
        document.getElementById('m1').style.display = 'none';
        document.getElementById('m2').style.display = 'none';
        document.getElementById('m3').style.display = 'none';
		document.getElementById('m4').style.display = 'none';
		document.getElementById('m5').style.display = 'none';
		document.getElementById('m6').style.display = 'none';
		document.getElementById('m7').style.display = 'none';
	document.getElementById('pm1').src = '/images/plus.png';
	document.getElementById('pm2').src = '/images/plus.png';
	document.getElementById('pm3').src = '/images/plus.png';
	document.getElementById('pm4').src = '/images/plus.png';
	document.getElementById('pm5').src = '/images/plus.png';
	document.getElementById('pm6').src = '/images/plus.png';
	document.getElementById('pm7').src = '/images/plus.png';
}
function menuexpand (i) {
        menuinit();
        if (myvar == i) {
		document.getElementById('p' + i).src = '/images/plus.png';
		document.getElementById(i).style.display = 'none';
		myvar = '';
	}
        else {
		document.getElementById('p' + i).src = '/images/minus.png';
		document.getElementById(i).style.display = 'block';
		myvar = i;
	}
}

function initScroller() {
  // arguments: id of layer that scrolls, width and height of scroller (of wn), 
  // number of items (including repeated 1st item), axis ("v" or "h")
  // set up pause/resume onmouseover/out? (true or false)
  var scr1 = new dw_scroller('cnt', 360, 140, 6, "v", true);
  scr1.setTiming(200, 5000);
}

function dw_scroller(id, w, h, num, axis, bMouse) {
    this.id=id; this.el = document.getElementById? document.getElementById(id): null; 
    if (!this.el) return; this.css = this.el.style; 
    this.css.left = this.x = 0; this.css.top = this.y = 0;
    this.w=w; this.h=h; this.num=num; this.axis=axis||"v"; 
    this.ctr=0; // pause onload (for large doc's, may want to set this to 1)
    this.pause=5000; this.speed=60; // defaults
    if (bMouse) dw_scrollers.setMouseEvents(this.el);
    this.lastTime = new Date().getTime(); this.check = 0;
    this.index = dw_scrollers.ar.length;  dw_scrollers.ar[this.index] = this;
    this.active = true;
}

dw_scroller.prototype.setTiming = function(speed, pause) {
    this.speed = speed; this.pause = pause;
}

dw_scroller.prototype.controlScroll = function() {
    if (this.ctr > this.num-1) {
        this.shiftTo(0, 0); this.ctr = 1;
    } else {
        switch (this.axis) {
            case "v" :
                if (this.y > -this.h * this.ctr) { 
                    var ny = this.y + -1 * this.elapsed/1000 * this.speed;
                    ny = Math.max(ny, -this.h * this.ctr);
                    this.shiftTo(0, ny);	
                } else this.doPause();
                break;
            case "h" :
                if (this.x > -this.w * this.ctr) { 
                    var nx = this.x + -1 * this.elapsed/1000 * this.speed;
                    nx = Math.max(nx, -this.w * this.ctr);
                    this.shiftTo(nx, 0);	
                } else this.doPause();
            break;
        }
    }
}

dw_scroller.prototype.doPause = function() {
    this.check += this.elapsed;
    if (this.check >= this.pause) { this.ctr++; this.check = 0; }
}

dw_scroller.prototype.shiftTo = function(x, y) {
    this.css.left = (this.x = x) + "px";
    this.css.top = (this.y = y) + "px";
}

////////////////////////////////////////////////////////////////////////////
// common to all scrollers (pausing or continuous, vertical or horizontal)
dw_scrollers = {};  
dw_scrollers.ar = []; // global access to all scroller instances

dw_scrollers.setMouseEvents = function(obj) {
    obj.onmouseover = dw_scrollers.halt;
    obj.onmouseout = dw_scrollers.resume;
}

dw_scrollers.halt = function() {
    var curObj;
    for (var i=0; curObj = dw_scrollers.ar[i]; i++) 
        if ( curObj.id == this.id ) { curObj.active = false; return; }
}

dw_scrollers.resume = function(e) {
    var curObj;
    for (var i=0; curObj = dw_scrollers.ar[i]; i++) {
        if ( curObj.id == this.id ) {
            e = e? e: window.event;
            var toEl = e.relatedTarget? e.relatedTarget: e.toElement;
            if ( this != toEl && !dw_contained(toEl, this) ) { 
                var now = new Date().getTime();
                curObj.elapsed = now - curObj.lastTime;
                curObj.lastTime = now; curObj.active = true; return; 
            }
        }
    }
}

// Handle all instances with one timer - idea from youngpup.net
dw_scrollers.timer = window.setInterval("dw_scrollers.control()", 10);
dw_scrollers.control = function() {
    var curObj;
    for (var i=0; curObj = dw_scrollers.ar[i]; i++) {
        if ( curObj.active ) {
            var now = new Date().getTime();
            curObj.elapsed = now - curObj.lastTime;
            curObj.lastTime = now; curObj.controlScroll();
        }
    }
}

// remove layers from table for ns6+/mozilla (needed for scrollers inside tables)
// pass id's of scrollers (i.e., div's that contain content that scrolls, usually wn, or wn1, ...)
dw_scrollers.GeckoTableFix = function() {
    var ua = navigator.userAgent;
    if ( ua.indexOf("Gecko") > -1 && ua.indexOf("Firefox") == -1 
        && ua.toLowerCase().indexOf("like gecko") == -1 ) {
        dw_scrollers.hold = []; // holds id's of wndo (i.e., 'the scroller') and its container
        for (var i=0; arguments[i]; i++) {
            var wndo = document.getElementById( arguments[i] );
            var holderId = wndo.parentNode.id;

            var holder = document.getElementById(holderId);
            document.body.appendChild( holder.removeChild(wndo) );
            wndo.style.zIndex = 1000;
            var pos = getPageOffsets(holder);
            wndo.style.left = pos.x + "px"; wndo.style.top = pos.y + "px";
            dw_scrollers.hold[i] = [ arguments[i], holderId ];
        }
        window.addEventListener("resize", dw_scrollers.rePosition, true);
    }
}

// ns6+/mozilla need to reposition layers onresize when scrollers inside tables.
dw_scrollers.rePosition = function() {
    if (dw_scrollers.hold) {
        for (var i=0; dw_scrollers.hold[i]; i++) {
            var wndo = document.getElementById( dw_scrollers.hold[i][0] );
            var holder = document.getElementById( dw_scrollers.hold[i][1] );
            var pos = getPageOffsets(holder);
            wndo.style.left = pos.x + "px"; wndo.style.top = pos.y + "px";
        }
    }
}

function getPageOffsets(el) {
    var left = el.offsetLeft;
    var top = el.offsetTop;
    if ( el.offsetParent && el.offsetParent.clientLeft || el.offsetParent.clientTop ) {
        left += el.offsetParent.clientLeft;
        top += el.offsetParent.clientTop;
    }
    while ( el = el.offsetParent ) {
        left += el.offsetLeft;
        top += el.offsetTop;
    }
    return { x:left, y:top };
}

// returns true if oNode is contained by oCont (container)
function dw_contained(oNode, oCont) {
  if (!oNode) return; // in case alt-tab away while hovering (prevent error)
  while ( oNode = oNode.parentNode ) if ( oNode == oCont ) return true;
  return false;
}

// avoid memory leak in ie
dw_scrollers.unHook = function() {
  var i, curObj;
  for (i=0; curObj = dw_scrollers.ar[i]; i++) {
    if ( curObj.el ) { 
      curObj.el.onmouseover = null;
      curObj.el.onmouseout = null;
      curObj.el = null;
    }
  }
}

if ( window.addEventListener ) window.addEventListener( "unload", dw_scrollers.unHook, true);
else if ( window.attachEvent ) window.attachEvent( "onunload", dw_scrollers.unHook );