function init(){
	w=600;
	h=500;
	w=parseInt(document.getElementById("tcara").width)+100;
	if(isNaN(w) == true){
   w=800;
	}
	h=document.getElementById("tcara").offsetHeight + 200;
	if (w>screen.availWidth) {w = screen.availWidth};
	if (h>screen.availHeight) {h = screen.availHeight};
	self.resizeTo(w, h);
	x = (screen.availWidth - w) / 2;
	y = (screen.availHeight - h) / 2;
	if (x<0) {
    x=0;
	}	 
	self.moveTo(x, y);
}