///////////////////////////////////////////////////////////////////
// Abre uma janela centrada
///////////////////////////////////////////////////////////////////
function showPopUp(URL, width, height, globalVar) {
	g_var = globalVar;
	PopUp(URL, "Pop", width, height);
}
function GoToPage(page){
			document.forms.item('frmMain').currentPage.value = page;
			document.forms.item('frmMain').submit();
		}
		
		
<!--LIMITA O INPUT SÓ A NÚMEROS-->
var numbersonly = "0123456789";
var numb = "()- 0123456789";
var alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ ";
function res(t,v){
    var w = "";
    for (i=0; i < t.value.length; i++) {
        x = t.value.charAt(i);
        if (v.indexOf(x,0) != -1)
         w += x; 
    }
    t.value = w;
}



function if_enter_click_on( button_id ){
   var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
   if (keyCode == 13)
    {   
        event.keyCode = 0;
        var button = document.getElementById(button_id);
		if (button.click)
            button.click();     // IE
         else
            {
                // FireFox
                var e = document.createEvent("MouseEvents");
                e.initEvent("click", true, true);
                button.dispatchEvent(e);
            }
    }
}





<!-- Begin
var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
var keyCode = (isNN) ? e.which : e.keyCode; 
var filter = (isNN) ? [0,8,9] : [0,8,9,13,16,17,18,37,38,39,40,46];

if(keyCode=='13'){
	input.value = input.value.slice(0, len);
	input.form[(getIndex(input)+1) % input.form.length].focus();
	
	event.returnValue = false;
	event.cancel = true;
	event.keyCode=0;
} 

if(input.value.length >= len && !containsElement(filter,keyCode)) {
	input.value = input.value.slice(0, len);
	input.form[(getIndex(input)+1) % input.form.length].focus();
	
}
function containsElement(arr, ele) {
var found = false, index = 0;
while(!found && index < arr.length)
if(arr[index] == ele)
found = true;
else
index++;
return found;
}
function getIndex(input) {
var index = -1, i = 0, found = false;
while (i < input.form.length && index == -1)
if (input.form[i] == input)index = i;
else i++;
return index;
}
return true;
}


//função para gerar uma janela popup
function nova_janela(onde,largura,altura) {
	var a = screen.width ;
	var b = screen.height ;
	if (largura == 0) { largura=640 }
	if (altura == 0) { altura=480 }
	metade_largura=largura/2;
	metade_altura=altura/2;	
	var resultado = (a / 2) - metade_largura ;
	var resultado2 = (b / 2) - metade_altura ;
	window.open (onde, '_blank', 'scrollbars=yes,status=no,width=' + largura +',height=' + altura + ',left=' + resultado + ',top=' + resultado2 + ',menubar=no');

}


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];}}
}


// End -->