function change_img(name,src) {
	//alert(window.document.images[name].src);
	window.document.images[name].src=src;
}

function popup(url,width,height,xPosProzent,yPosProzent,scrollbars) {
	 if (window.newwin) {if (!window.newwin.closed) window.newwin.close()}
	 null_or_undefined=(document.layers)?undefined:null
	 if (width      ==null_or_undefined) width      = 500 // (default)
	 if (height     ==null_or_undefined) height     = 400 // (default)
	 if (xPosProzent==null_or_undefined) xPosProzent=  50 // (default)
	 if (yPosProzent==null_or_undefined) yPosProzent=  50 // (default)
	 if (scrollbars ==null_or_undefined) scrollbars =   0 // (default)

	 var x=(screen.width -width )*xPosProzent/100
	 var y=(screen.height-height)*yPosProzent/100
	 var paras="resizable=1,scrollbars="+scrollbars+",toolbar=0,menubar=0,location=0,status=0,directories=0,width="+width+",height="+height
	 if (document.layers) window.newwin=window.open('',"pinPopupWindow",paras+",screenX="+x+",screenY="+y)
	 else                 window.newwin=window.open('',"pinPopupWindow",paras);window.newwin.moveTo(x,y)
	 window.newwin.location=url
}