function OpenCalc(){
	vWidth = 282;
	vHeight = 320;
	vleft=screen.width/2-(vWidth/2);
	vtop=screen.height/2-(vHeight/2)-27;
		
	vPopup = window.open("../includes/mortgage_en.htm", "popup", "toolbar=no,location=0,directories=no,status=no,menubar=0,scrollbars=no,resizable,width="+vWidth+",height="+vHeight+",top="+vtop+",left="+vleft);
	
	vPopup.focus();
}