function mailwin(){
	var option;
	if(window.screen.width>300){
		option+=",left="+(window.screen.width-300)/2;
	}
	if(window.screen.height>150){
		option+=",top="+(window.screen.height-150)/2;
	}
	window.open('','new','width=300,height=150,menubar=no,toolbar=no,resize=no'+option);
	
	document.frmMail.target='new';
	document.frmMail.submit();
}