// JavaScript Document
function open_webcam() 
					{
	
			var links=(screen.width - 700) / 2;
    		var oben=(screen.height - 540) / 2;
			newwin = window.open("seezeichen_webcam.html","seezeichen_webcam","left=" + links + ", top=" + oben + ",screenX=" + links + ", screenY=" + oben + ", width=700,height=540,scrollbars=no");
   					 }