var x_cord= (screen.availWidth*0.5)-250;
var y_cord= (screen.availHeight*0.5)-200;
var fenster;

function popUpBig(){
	if(fenster && !fenster.closed){
		fenster.close();
	}
	fenster = window.open("", "POPUP","width=600,height=500,innerWidth=600,innerHeight=500,left="+x_cord+"top="+y_cord);
}
function popUp(){
	if(fenster && !fenster.closed){
		fenster.close();
	}
	fenster = window.open("", "SONG", "width=600,height=500,innerWidth=500,innerHeight=400,left="+x_cord+"top="+y_cord);
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
  
function preload_images() {
	if (document.images) {
		newImage("images/low-flow-home.jpg");
		newImage("images/low-flow-home_over.jpg");
		newImage("images/low-flow-band.jpg");
		newImage("images/low-flow-band_over.jpg");
		newImage("images/low-flow-music.jpg");
		newImage("images/low-flow-music_over.jpg");		
		newImage("images/low-flow-guests.jpg");
		newImage("images/low-flow-guests_over.jpg");
		newImage("images/low-flow-links.jpg");
		newImage("images/low-flow-links_over.jpg");		
		newImage("images/low-flow-contact.jpg");
		newImage("images/low-flow-contact_over.jpg");
		newImage("images/submit-button_over.jpg");
		newImage("images/submit-button.jpg");		
	}
}