function ShowPop(id)
{
	if (document.getElementById)
	{
   		document.getElementById(id).style.visibility = " visible";
	}
	else if (document.all)
	{
		document.all[id].style.visibility = " visible";
	}
	else if (document.layers)
	{
		document.layers[id].style.visibility = " visible";
	}
}


function HidePop(id)
{
   	if (document.getElementById)
	{
   		document.getElementById(id).style.visibility = " hidden";
	}
	/*else if (document.all)
	{
		document.all[id].style.visibility = " hidden";
	}
	else if (document.layers)
	{
		document.layers[id].style.visibility = " hidden";
	}*/
}


function TogglePop(id)
{
   	if (document.getElementById)
	{
		if(document.getElementById(id).style.visibility  == "visible"){
			document.getElementById(id).style.visibility = "hidden";
		}
		else{
			document.getElementById(id).style.visibility  = "visible";
		}
	}
	else if (document.all)
	{
		if(document.all[id].style.visibility  == "visible"){
			document.all[id].style.visibility  = "hidden";
		}
		else{
			document.all[id].style.visibility = "visible";
		}
	}
	else if (document.layers)
	{
		if(document.layers[id].style.visibility == "visible"){
			document.layers[id].style.visibility = "hidden";
		}
		else{
			document.layers[id].style.visibility = "visible";
		}
	}
}


function toggleLayer(whichLayer)
{
	if (document.getElementById)
	{
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		style2.display = style2.display? "":"none";
		var link  = document.getElementById(whichLayer+"_").innerHTML;
		if(link.indexOf("(+)") >= 0){
			document.getElementById(whichLayer+"_").innerHTML="(-)"+link.substring(3,link.length);
		}
		else{
			document.getElementById(whichLayer+"_").innerHTML="(+)"+link.substring(3,link.length);
		}
	}//end if
	else if (document.all)
	{
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		style2.display = style2.display? "":"none";
		var link  = document.all[wwhichLayer+"_"].innerHTML;
		if(link.indexOf("(+)") >= 0){
    		document.all[whichLayer+"_"].innerHTML="(-)"+link.substring(3,link.length);
		}
		else{
			document.all[whichLayer+"_"].innerHTML="(+)"+link.substring(3,link.length);
		}
	}
	else if (document.layers)
	{
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		style2.display = style2.display? "":"none";
		var link  = document.layers[whichLayer+"_"].innerHTML;
		if(link.indexOf("(+)") >= 0){
			document.layers[whichLayer+"_"].innerHTML="(-)"+link.substring(3,link.length);
		}
		else{
			document.layers[whichLayer+"_"].innerHTML="(+)"+link.substring(3,link.length);
		}
	}
}//end function

var checkflag="false";
function check(field) {
  if (checkflag == "false") {
    for (i = 0; i < field.length; i++) {
      field[i].checked = true;
    }
    checkflag = "true";
    return "Uncheck all"; 
  }  
  else {
    for (i = 0; i < field.length; i++) {
      if(field[i].type == 'checkbox'){
        field[i].checked = false; 
      }
    }
    checkflag = "false";
    return "Check all"; 
  }
}