function blocking(nr,img)
{
	if (document.layers)
	{
		current = (document.layers[nr].display == 'none') ? 'block' : 'none';
		//imgSrc = (document.layers[nr].display == 'none') ? '../images/minus.gif' : '../images/plus.gif';
		document.layers[nr].display = current;
		//document.images[img].src = imgSrc;
	}
	else if (document.all)
	{
		current = (document.all[nr].style.display == 'none') ? 'block' : 'none';
		//imgSrc = (document.all[nr].style.display == 'none') ? '../images/minus.gif' : '../images/plus.gif';
		document.all[nr].style.display = current;
		//document.images[img].src = imgSrc;
	}
	else if (document.getElementById)
	{
		vista = (document.getElementById(nr).style.display == 'none') ? 'block' : 'none';
		//imgSrc = (document.getElementById(nr).style.display == 'none') ? '../images/minus.gif' : '../images/plus.gif';
		document.getElementById(nr).style.display = vista;
		//document.images[img].src = imgSrc;
	}
}

function getRadioValue(radioName)
	{
		var inputs = document.getElementsByTagName('input');
		var inputsLength = inputs.length;
		for (var i=0; i < inputsLength; i++)
		{
			if (inputs[i].type == 'radio' && inputs[i].name == radioName && inputs[i].checked) return inputs[i].value;
		}
		return null;
	}
	
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;
   
}

    function opacity(id, opacStart, opacEnd, millisec) {
        //speed for each frame
        var speed = Math.round(millisec / 100);
        var timer = 0;
    
        //determine the direction for the blending, if start and end are the same nothing happens
        if(opacStart > opacEnd) {
            for(i = opacStart; i >= opacEnd; i--) {
                setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
                timer++;
            }
        } else if(opacStart < opacEnd) {
            for(i = opacStart; i <= opacEnd; i++)
                {
                setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
                timer++;
            }
        }
    }    
    //change the opacity for different browsers
    function changeOpac(opacity, id) {
        var object = document.getElementById(id).style;
        object.opacity = (opacity / 100);
        object.MozOpacity = (opacity / 100);
        object.KhtmlOpacity = (opacity / 100);
        object.filter = "alpha(opacity=" + opacity + ")";
    } 

function addslashes(str) {
  str=str.replace(/\'/g,'\\\'');
  str=str.replace(/\"/g,'\\"');
  str=str.replace(/\\/g,'\\\\');
  str=str.replace(/\0/g,'\\0');
  return str;
}

function stripslashes(str) {
  str=str.replace(/\\'/g,'\'');
  str=str.replace(/\\"/g,'"');
  str=str.replace(/\\\\/g,'\\');
  str=str.replace(/\\0/g,'\0');
  return str;
}
function validEmail(str){
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	return filter.test(str);
}