/**********************************************************************/
/* Funktion laed Images vor          																  */	
/**********************************************************************/
function preload_images() 
{ 
  var d=document; 
	if(d.images)
	{ 
		if(!d.MM_p) d.MM_p=new Array();
   	var i,j=d.MM_p.length,a=preload_images.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];
			}
		}
	}
}		

/**********************************************************************/
/* Funktion checkt die E-Mail-Adresse																  */	
/**********************************************************************/
function isEmail(Letter)
{
        var iX;
        var iY=0;
        var lastpoint=0;
        for (iX=0;iX<Letter.length;iX++)
        {
                if (Letter.charAt(iX)=="@")
                        iY++;
        }
        for (iX=0;iX<Letter.length;iX++)
        {
                if (Letter[iX]==".")
                        lastpoint=iX;
        }
                if ( (Letter.indexOf(".")!=-1) && (Letter.indexOf("@")!=Letter.length)
          && (Letter.indexOf(".")!=Letter.length) && (Letter.indexOf(" ")==-1) 
          && (Letter.indexOf(".")<Letter.length-2) && (iY==1)
          && (Letter.indexOf("@")!=0) && (Letter.charAt(Letter.indexOf("@")+1)!="."))
                return true;
        else
                return false;
}



	

/**********************************************************************/
/* Funktion oeffnet ein	Pop-Up-Fenster							             			*/	
/**********************************************************************/
function open_window(url, w, h, winname, scroll, resize)  
{
	var winleft = (screen.width - w) / 2; 
	var wintop = (screen.height - h) / 2;
	var winprops = "height="+h+",width="+w+",top="+wintop+",left="+winleft+",scrollbars="+scroll+",resizable="+resize;
	//var windowname = "-"+(Math.random()*99999999);
	var win = window.open(url, winname, winprops);
	if(window.focus) 
	{
		win.focus();
	}
}