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_validateForm() { //v4.0
  var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
  for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
    if (val) { nm=val.name; if ((val=val.value)!="") {
      if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
        if (p<1 || p==(val.length-1)) errors+='- '+nm+' preenchimento incorreto!\n';
      } else if (test!='R') { num = parseFloat(val);
        if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
        if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
          min=test.substring(8,p); max=test.substring(p+1);
          if (num<min || max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
    } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' campo requerido.\n'; }
  } if (errors) alert('Os seguinte(s) erro(s) foram encontrado(s):\n'+errors);
  document.MM_returnValue = (errors == '');
}

 
function abre(){
	winwidth 	= 460; // width of the new window 
	winheight 	= 370; // height of the new window 
	winleft   	= 200; // just dummie values (nao alterar)
	wintop    	= 200; // just dummie values (nao alterar)
	  
	if(parseInt(navigator.appVersion)>=4)
	{winleft = (screen.width / 2) - (winwidth / 2); // center the window right to left 
	wintop = (screen.height / 2) - (winheight / 2); // center the window top to bottom 
	// the values get inserted into the features parameter of the window.open command... 
	}
	window.open('chat.php', '_blank', 'top=' + wintop + ',left=' + winleft + ',height=' + winheight + ',width=' + winwidth+',scrollbars = yes,menubar = yes');  
}