function popUp(url,width,height){
	myScreenHeight=(window.screen.availHeight-height)/2;
	myScreenWidth=(window.screen.availWidth-width)/2;
	newWindow=window.open(url,"subWind", "HEIGHT="+height+",WIDTH="+width+",menubar=no,toolbar=no,titlebar=yes,TOP="+myScreenHeight+",LEFT="+myScreenWidth+",scrollbars=yes");
	newWindow.focus();
}