//FUNCIO OBRI FINESTRES CENTRADES

function openwin(P_url,P_w,P_h,P_scroll){
	var win_id=parseInt(Math.random()*2000)
	var p_url=check_null_values(P_url,P_url,0);
	var p_w=check_null_values(P_w,P_w,400);
	var p_h=check_null_values(P_h,P_h,300);
	var p_scroll=check_null_values(P_scroll,'yes','no');
	
	
	var left_point = parseInt(window.screen.availWidth/2)-(p_w/2); 
	var top_point = parseInt(window.screen.availHeight/2)-(P_h/2); 

NewWindow=window.open(p_url,'win_'+win_id,'width='+p_w+',height='+p_h+',left='+left_point+',top='+top_point+',toolbar=No,location=No,scrollbars='+p_scroll+',status=No,resizable=No,fullscreen=No'); 
	NewWindow.focus(); 
}

function check_null_values(P_value,P_return,P_no_return){
	if(P_value){
		return P_return;
	}else{
		return 
		P_no_return;
	}
}

//PRELOAD IMAGES
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}