js検証メールフォーマット

"</span><span style="color:#800000;">text/javascript</span><span style="color:#800000;">"</span>><span style="color:#000000;">
        function validate_email(field, alerttxt) {
            with (field) {
                apos </span>= value.indexOf(<span style="color:#800000;">"</span><span style="color:#800000;">@</span><span style="color:#800000;">"</span><span style="color:#000000;">)
                dotpos </span>= value.lastIndexOf(<span style="color:#800000;">"</span><span style="color:#800000;">.</span><span style="color:#800000;">"</span><span style="color:#000000;">)
                alert(apos);
                alert(dotpos);
                </span><span style="color:#0000ff;">if</span> (apos < <span style="color:#800080;">1</span> || dotpos - apos < <span style="color:#800080;">2</span><span style="color:#000000;">)
                { alert(alerttxt); </span><span style="color:#0000ff;">return</span> <span style="color:#0000ff;">false</span><span style="color:#000000;"> }
                </span><span style="color:#0000ff;">else</span> { <span style="color:#0000ff;">return</span> <span style="color:#0000ff;">true</span><span style="color:#000000;"> }
            }
        }

        function validate_form(thisform) {
            with (thisform) {
                </span><span style="color:#0000ff;">if</span> (validate_email(email, <span style="color:#800000;">"</span><span style="color:#800000;">         !</span><span style="color:#800000;">"</span>) == <span style="color:#0000ff;">false</span><span style="color:#000000;">)
                { email.focus(); </span><span style="color:#0000ff;">return</span> <span style="color:#0000ff;">false</span><span style="color:#000000;"> }
            }
        }
    </span>

「XXXX.httm」οnsubmit=「return validatemo(this)」
Email:「text」name=「email」size=「30」/>
「submit」value=「Submit」/>
 
転載先:https://www.cnblogs.com/dreamflycc/archive/2013/01/25/2876652.html