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function checkMail(str){
var mailArray=str.split(',');
var patterns = /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/;
for(i=0;i <mailArray.length;i++){
if(patterns.test(mailArray[i])){return true;} //alert(str+",ÓʼþµØÖ·¸ñʽÕýÈ·£¡");
else{alert('"'+str+'",ÓʼþµØÖ·¸ñʽ²»ÕýÈ·,Çë¼ì²éºóÖØÐÂÌîд£¡£¡');return false;}
}
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function checkNum(obj){
    var reg = /^[0-9a-zA-Z]+$/g;
    if(!reg.test(obj)){
        alert("²»ºÏ·¨£¡")
      }
}
checkNum('12q3');

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