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

window.onbeforeunload = confirmExit;

function setOpacity(el, opacity) {

	//  Which opacity method does this browser support?

	opacity /= 100;

	el.style.opacity = opacity;
	el.style.MozOpacity = opacity;
	el.style.filter = "alpha(opacity=" + (opacity*100) + ")";

}

function jsleep(s) {
	s = s*1000;
	var a = true;
	var n = new Date();
	var w;
	var sMS = n.getTime();
	while(a) {
		w = new Date();
		wMS = w.getTime();
		if (wMS - sMS > s) a = false;
	}
}

function showHide( show_id, hide_id ) 
{
	var e1 = document.getElementById( show_id );
	e1.style.display = '';
	var e2 = document.getElementById( hide_id );
	e2.style.display = 'none';
	
}

function hide( id ) 
{
   var e = document.getElementById( id );
   e.style.display == 'none';
}

function toggleDisplay( id ) 
{
   var e = document.getElementById( id );
   if ( e.style.display == 'none' )
	  e.style.display = '';
   else
	  e.style.display = 'none';
}

function highlightCell( id, color )
{
	if ( !color )
		color = "#fc3";
		
	var elem = document.getElementById( id );
	elem.style.backgroundColor = color;
	
	var tainted = document.getElementById( "tainted" );
	if ( tainted )
		tainted.value = "1";
}

function untaint()
{
	var tainted = document.getElementById( "tainted" );
	if ( tainted )
		tainted.value = "";
}

function confirmExit()
{
	var tainted = document.getElementById( "tainted" );
	if ( tainted )
	{
		if ( tainted.value == "1" )
		{
				return "Any changes you have made will be lost.";
		}
	}
}

function previewImage( file_name, preview_size, image_width, image_height )
{
	if ( image_width == 0 )
		image_width = 610;
	else
		image_width += 20;
	
	if ( image_height == 0 )
		image_height = 400;
	else
		image_height += 25;
		
	file_name = escape( file_name );
		
	window_url = "/media/photo_preview.html?file_name=" + file_name + "&preview_size=" + preview_size;
	window_specs = "scrollbars=no,resizable=yes,toolbar=0,menubar=0,width=" + image_width + ",height=" + image_height;
	window.open(window_url, "preview", window_specs);
}


// Dreamweaver roll-overs
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];}
}
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];}}
}