function changeDiv(the_div,the_change)
{
  var the_style = getStyleObject(the_div);
  if (the_style != false)
  {
    the_style.display = the_change;
  }
}


function zm_W( pf ) {
	var displayPF = 'none';
	var displayAN = 'block';
	if( pf != 'pf' ) {
		displayPF = 'block';
		displayAN = 'none';
		//alert( 'PF' );
	}
	else {
		//alert( 'nie pf' );
	}
	changeDiv( 'pf_button_on',  displayPF );
	changeDiv( 'pf_button_off', displayAN );
	changeDiv( 'szukaj_pf',     displayPF );
	changeDiv( 'szukaj_anonse', displayAN );
	return false;
}

function getStyleObject(objectId) {
  if (document.getElementById && document.getElementById(objectId)) {
    return document.getElementById(objectId).style;
  } else if (document.all && document.all(objectId)) {
    return document.all(objectId).style;
  } else {
    return false;
  }
}

/*function checkPricePl(t,v){t.value = t.value.replace( ',', '.' );if(!~~(v=t.value+1) )if( parseFloat(t.value) >= 1 ) t.value=(v=parseFloat(v))?v:'';t.value = t.value.replace( '.', ',' );}*/


// version: beta
// created: 2005-08-30
// updated: 2005-08-31
// mredkj.com
function extractNumber(obj, decimalPlaces, allowNegative)
{
	var temp = obj.value.replace( ',', '.' );
	
	// 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 

			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.replace( '.', ',' );
}
function blockNonNumbers(obj, e, allowDecimal, allowNegative)
{
	var key;
	var isCtrl = false;
	var keychar;
	var reg;
obj.value = obj.value.replace( '.', ',' )		
	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;
	var isFirstD = allowDecimal  ? keychar == ',' && obj.value.indexOf(',') == -1 : false; // przecinek

//obj.value = obj.value.replace( '.', ',' )		
	
	return isFirstN || isFirstD || reg.test(keychar);
}