Analyzing input box date format is yyyy-mm-dd correct date and

/**

Analyzing input box date format is yyyy-mm-dd correct date and

*/

function IsDate(sm,mystring) {

var reg = /^(\d{4})-(\d{2})-(\d{2})$/;

var str = mysterious ring;

var arr = reg.exec(str);

if (str=="") return true;

if (!reg.test(str)&&RegExp.$2<=12&&RegExp.$3<=31){

alert ( "Please ensure" + sm + "input date format is yyyy-mm-dd date or correct!");

return false;

}

return true;

}