function big_block(){
	var mpr=ge('intro_mpr');
	mpr.style.display='block';
	center_show(mpr);
	ge('biztel_1').focus();
}
function rew_enter(){
	ge('intro_mpr').style.display='none';
}
function biz_phone(tel,form){
	if(!tel){
		tel=telephone();
		if(!tel){
			//window.scroll(0,0);
			ge('biztel_1').focus();
			location.href='#top';
			valert('Please key in a complete 10-digit phone number<br>begining with the area code.','business phone');
			return false;
		}
	}
	if(form){
		location.href="i.php?typ=1&pg=102&px=1&tel="+tel;
	}else{
		location.href="i.php?typ=1&pg=102&tel="+tel;
	}
}
function teletype(e,targ,maxi,nx){
	var key;
	var ieblows=window.event;
	if(ieblows){ // IE
		key=e.keyCode;
  }else if(e.which){
		key=e.which;
  }
	if(key==46 || key==8 || key==undefined){return true;}
	var numcheck=/\d/;
	var go=numcheck.test(String.fromCharCode(key));
	var mnx=(ieblows)?maxi:maxi-1;
	if(targ.value.length==mnx && go && nx>0){
		targ=ge('biztel_'+nx);
		targ.focus();
	}
	return go;
}
function telego(){
	var tel=telephone();
	if(tel){
		biz_phone(tel);
	}
}
function telefo(){
	var tel=telephone();
	if(tel){
		biz_phone(tel,1);
	}
}
function telephone(){
	var tg3=ge('biztel_3');
	var tel=false;
	if(tg3.value.length==4){
		var tg1=ge('biztel_1');
		var tg2=ge('biztel_2');
		tg1.value=tg1.value.replace(/[^0-9]/g,'');
		tg2.value=tg2.value.replace(/[^0-9]/g,'');
		tg3.value=tg3.value.replace(/[^0-9]/g,'');
		
		tel=tg1.value+tg2.value+tg3.value;
		
		if(tel.length<10){tel=false;}
	}
	return tel;
}