jquery form Validation

//Verify the information for the formvarMessage= "";functionValidate () {varLienceplate = document.getElementById ("Lienceplate");//License plate number    varBar_code = document.getElementById ("Bar_code");//Vehicle Barcode    varPhoneNumber = document.getElementById ("PhoneNumber");//Telephone    varMobile =/^1[3458]\d{9}$/;//Phone number    varLienceplatereg =/^[\u4e00-\u9fa5]{1}[a-z]{1}[a-za-z_0-9]{5}$/;//the regular of the car, the letter case can be    varBar_codereg =/^[a-z]{2}[0-9]{8}$/;//Vehicle Barcode    if(Lienceplate.value! = "") {        if(!lienceplatereg.test (Lienceplate.value)) {Message= "Plate number format error"; return false; }    }    Else{message= "License plate number cannot be empty"; return false; }       if(Bar_code.value! = "") {        if(!bar_codereg.test (Bar_code.value)) {Message= "Vehicle Barcode format Error"; return false; }    }    Else{message= "Vehicle barcode cannot be empty"; return false; }    if(Phonenumber.value! = "") {        if(!mobile.test (Phonenumber.value)) {Message= "Contact input format error"; return false; }    }    Else{message= "Contact cannot be empty"; return false; }    return true;}

jquery form Validation