// is number type
function isNum(str){
	var a = str.match(/^[0-9]*$/);	
	if (a == null) {
		return false;
	} 
	else{	
		return true; 
	}
 }
 
 function isEmail(email) {
        if(email != "") {
            if(!/(\S)+[@]{1}(\S)+[.]{1}(\w)+/.test(email)) 
            {
               // alert("e-mail is error!");
               return false;
			}
	}
	return true;
}

function isMobile(phone)
{
 var reg0=/^13\d{5,9}$/;   
 var reg1=/^153\d{4,8}$/;  
 var reg2=/^159\d{4,8}$/;  
 var my=false;
 if (reg0.test(phone))my=true;
 if (reg1.test(phone))my=true;
 if (reg2.test(phone))my=true;
 if (phone.length==11)my = true;
 else{
	my = false;
 }
 if (!my){
	
		//alert('phone error!');
	}

return my;
}