/* Array Utilities */
Array.prototype.hasObject = ( !Array.indexOf
	? function (o) {
		var l = this.length + 1;
		while (l -= 1) if (this[l - 1] === o) return true;
		return false;
	}
	: function (o) { return (this.indexOf(o) !== -1); }
);


/* Browser Utilities */
function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
	window.onload = func;
    } else {
	window.onload = function() {
	    if (oldonload) oldonload();
	    func();
	}
    }
}

function toogleVisible(s, v){
    if(s){
	if(v){
	    s.style.visibility = 'visible';
	    s.style.display = 'block';
	}else{
	    s.style.visibility = 'hidden';
	    s.style.display = 'none';
	}
    }
}

function disableEnterKey(e)
{
     var key;
     if(window.event)
          key = window.event.keyCode; //IE
     else
          key = e.which; //firefox

     return (key != 13);
}

/**
 *
 * @access public
 * @return void
 **/
 function disableForm(i){
 	f = document.getElementById(i);
 	if(f){
 		var len=f.elements.length;
		for(x=0;x<len;x++) f.elements[x].disabled=true;
 	}
}

function numericField(myfield, e, dec)
{
    var key;
    var keychar;

    if (window.event) key = window.event.keyCode;
    else if (e) key = e.which;
    else return true;
    keychar = String.fromCharCode(key);

    if ((key==null) || (key==0) || (key==8) ||  (key==9) || (key==13) || (key==27) )
	return true;

    else if ((("0123456789").indexOf(keychar) > -1)) return true;
    else if (dec && (keychar == "."))
    {
	myfield.form.elements[dec].focus();
	return false;
    }
    else
	return false;
}


/* Macromedia OldSchool cropped script for preloading images */
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_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_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];
	}
}

var g_u = '';
function preloadImages(){
    MM_preloadImages(g_u + 'images/meng_u_homeOver.gif',
	g_u + 'images/meng_u_coachesOver.gif',
	g_u + 'images/meng_u_videosOver.gif',
	g_u + 'images/meng_u_blogsOver.gif',
	g_u + 'images/meng_u_newsOver.gif',
	g_u + 'images/meng_u_forg_umsOver.gif');
}